RFQ, RFP, and ITB are not interchangeable procurement methods. An RFQ is generally suited to clearly defined requirements where suppliers can provide comparable quotations; an ITB is commonly used for formally defined requirements that can be evaluated against established specifications; and an RFP is generally appropriate when suppliers need to propose a methodology, technical approach, or solution.
In humanitarian and development procurement, selecting the appropriate solicitation method is important for achieving competition, value for money, transparency, fairness, and compliance. The correct choice depends not only on procurement value, but also on how clearly the requirement can be specified, how supplier offers need to be evaluated, the complexity and risk of the requirement, market conditions, urgency, and the organization's procurement rules.
This guide explains the differences between a Request for Quotation (RFQ), Invitation to Bid (ITB), and Request for Proposal (RFP). It provides practical examples and a decision framework for procurement professionals working in NGOs, UN agencies, humanitarian organizations, development organizations, and other institutional procurement environments.
Important: The terminology, thresholds, evaluation methodology, approval requirements, and permitted solicitation methods vary between organizations. The explanations in this article describe common procurement practice and should not replace the current procurement manual, delegation of authority, donor requirements, or other applicable rules.
If you are new to the overall procurement cycle, start with our humanitarian procurement process guide. For a broader explanation of competitive and non-competitive procurement approaches, see our guide to procurement methods.
RFQ vs RFP vs ITB: The Difference in One Minute
If you need a quick starting point, think about the three methods this way:
| Method | Simple explanation |
|---|---|
| RFQ | "The requirement is clear. Please provide a comparable quotation for what we have specified." |
| ITB | "The requirement is clearly and formally defined. Submit your bid against the established specifications." |
| RFP | "Here is the requirement or desired outcome. Explain how you will deliver it and provide your price." |
These are simplified explanations, not universal legal definitions. The applicable organization's procurement policy determines the actual circumstances in which each method can be used.
What Are RFQ, RFP, and ITB?
RFQ, RFP, and ITB are solicitation methods used to obtain offers from potential suppliers or service providers. Although the names are sometimes used differently by different organizations, the main distinction is usually related to how clearly the requirement can be defined and how the resulting offers need to be evaluated.
- RFQ (Request for Quotation): Generally used when the requirement is sufficiently clear and standardized for suppliers to provide comparable quotations. Price is usually an important evaluation factor, subject to technical compliance, commercial requirements, and the applicable procurement rules.
- ITB (Invitation to Bid): Generally used for a formal competitive bidding process where the requirement is clearly and precisely defined. Bidders submit formal bids against established specifications, and many procurement frameworks use the lowest-priced technically compliant or acceptable bid as the award basis.
- RFP (Request for Proposal): Generally used when the buyer needs suppliers to propose a methodology, technical approach, solution, or other substantive response. Technical and financial factors are normally evaluated against criteria established before the solicitation is issued.
Major international organizations use these methods within their own procurement frameworks. UNDP, WHO, UNHCR, and other international organizations publish organization-specific procurement guidance, and their terminology, thresholds, procedures, and evaluation methods should be consulted when applying these concepts to an actual procurement.
RFQ vs RFP vs ITB: Key Differences
The following table provides a practical comparison of common procurement practice. It should be treated as a decision aid rather than a universal procurement rule.
| Factor | RFQ | ITB | RFP |
|---|---|---|---|
| Requirement | Clearly defined and generally standardized | Clearly and precisely defined | May require a proposed solution, methodology, or technical approach |
| Typical complexity | Low to moderate | Low to moderate, depending on the procurement | Moderate to high or otherwise requiring substantive technical evaluation |
| Supplier response | Quotation | Formal bid | Technical and financial proposal |
| Evaluation | Price plus predefined compliance and commercial criteria | Technical compliance followed commonly by price comparison | Predefined technical and financial evaluation criteria |
| Role of price | Usually a major factor | Often the determining factor among technically acceptable bids | One of several predetermined factors |
| Specification | Detailed enough for comparable quotations | Precise specifications, drawings, statements of requirements, or other defined requirements | Terms of reference, performance requirements, outputs, or scope that may allow different technical approaches |
| Typical examples | Standard goods, routine services, or simple requirements | Clearly specified goods, works, or services requiring formal competitive bidding | Consultancy, technical services, complex assignments, or solutions requiring substantive technical evaluation |
What Is an RFQ?
A Request for Quotation (RFQ) is generally appropriate when the buyer can describe the requirement clearly enough for suppliers to provide comparable quotations.
An RFQ is particularly useful for standard goods, routine services, or other clearly defined requirements where suppliers do not need to develop substantially different technical solutions.
For example, a humanitarian organization may need a defined quantity of standard office supplies, hygiene materials, routine vehicle maintenance, or another clearly specified requirement. If suppliers can quote against essentially the same specification, an RFQ may be appropriate when permitted by the organization's procurement procedures.
RFQ evaluation should not be understood simply as accepting the cheapest number submitted. The organization should evaluate quotations against the criteria stated in the solicitation, including technical compliance, delivery requirements, commercial conditions, and other mandatory requirements. In many procurement frameworks, the award is made to the lowest-priced technically acceptable or compliant offer.
When May an RFQ Be Appropriate?
- The requirement is clearly defined.
- Specifications are sufficiently detailed and unambiguous.
- Suppliers are expected to provide comparable goods or services.
- The organization does not need competing technical methodologies.
- The applicable procurement policy permits an RFQ for the estimated value and type of requirement.
- Market conditions provide sufficient competition for meaningful quotations.
Example of an RFQ Requirement
Hypothetical example: An NGO needs 500 standardized blankets with specified dimensions, material, weight, color, packaging, delivery location, and delivery date. Because the organization can define the product precisely and suppliers can quote against the same requirements, an RFQ may be appropriate if allowed under the organization's procurement procedures.
What Is an ITB?
An Invitation to Bid (ITB) is a formal solicitation generally used when the requirement is clearly and precisely defined and suppliers can submit bids against established specifications.
An ITB is particularly appropriate when the buyer does not need bidders to develop substantially different technical approaches. The solicitation establishes what is required, and bidders submit formal offers demonstrating their ability and price to meet those requirements.
In many procurement frameworks, an ITB is evaluated based on compliance with the established requirements and, among technically acceptable or compliant bids, price becomes a key award factor. The exact evaluation and award methodology must always follow the organization's procurement policy and the criteria stated in the solicitation.
When May an ITB Be Appropriate?
- The requirement can be clearly and precisely specified.
- The buyer does not need bidders to develop substantially different technical solutions.
- The goods, works, or services can be evaluated against predetermined requirements.
- The procurement requires a formal competitive solicitation under the applicable policy.
- Price is expected to be a major determining factor after technical compliance has been established.
Example of an ITB Requirement
Hypothetical example: An organization needs construction works based on completed drawings, technical specifications, bills of quantities, quality requirements, and defined completion conditions. If the applicable procurement policy requires or permits an ITB, bidders can compete based on their ability to meet the established requirements and the price of their bids.
The important point is that an ITB should not be defined simply as a procurement method for "large purchases." Procurement value can influence the required method, but the clarity and nature of the requirement, formality of the process, and applicable procurement policy are also important.
What Is an RFP?
A Request for Proposal (RFP) is generally used when the buyer needs suppliers or service providers to propose how they will meet the requirement and when technical considerations form a significant part of the evaluation.
An RFP is particularly useful when the requirement cannot be sufficiently defined through a simple fixed specification or when several technically sound approaches may be possible.
For example, a humanitarian organization commissioning a complex evaluation, technical consultancy, third-party monitoring assignment, organizational capacity assessment, or specialized information-management solution may need bidders to explain their methodology, staffing, work plan, technical approach, relevant experience, quality assurance system, and price.
When May an RFP Be Appropriate?
- The buyer needs bidders to propose a methodology, solution, or technical approach.
- The requirement cannot be fully expressed through a simple fixed specification.
- Professional expertise or technical capability is important to the outcome.
- Several technically different solutions could satisfy the underlying requirement.
- Technical and financial proposals need to be evaluated against predefined criteria.
- Price alone would not adequately identify the most suitable offer.
Example of an RFP Requirement
Hypothetical example: An NGO needs an independent third-party monitoring provider to assess programme implementation across several locations. The organization can define the objectives, geographic coverage, expected outputs, reporting requirements, ethical standards, and timeframe, but it may need bidders to propose their methodology, sampling approach, staffing structure, quality assurance system, and work plan. An RFP may therefore be more appropriate than a straightforward quotation process, subject to the applicable procurement rules.
RFQ vs RFP vs ITB: How to Choose
The most useful way to select between these methods is to start with the nature of the requirement and the way offers need to be evaluated, rather than starting with procurement value alone.
Step 1: Can the requirement be specified clearly?
If suppliers can respond to the same detailed requirements and provide genuinely comparable offers, an RFQ or ITB may be appropriate, depending on the value, formality, type of procurement, and applicable policy.
Step 2: Does the buyer need suppliers to propose a methodology or solution?
If suppliers need to explain how they will achieve the required outcome, and their methodology or technical approach is an important part of the evaluation, an RFP may be more appropriate.
Step 3: Is the requirement formally defined?
If the organization has established precise specifications, drawings, bills of quantities, technical requirements, or other firm requirements and needs a formal bidding process, an ITB may be appropriate where permitted by policy.
Step 4: Can suppliers provide comparable quotations?
If suppliers can quote against essentially the same requirement without developing alternative technical solutions, an RFQ may be appropriate where permitted by the applicable procurement policy and threshold.
Step 5: Does technical quality require substantive evaluation?
If the procurement depends heavily on methodology, professional judgment, technical capability, experience, staffing, innovation, or alternative solutions, consider whether an RFP would provide a more appropriate evaluation framework.
Step 6: What does the procurement policy require?
Before issuing any solicitation, check the organization's current procurement manual, financial thresholds, delegation of authority, competition requirements, solicitation templates, evaluation methodology, approval requirements, and documentation requirements.
RFQ vs RFP vs ITB Decision Matrix
| Question | If the answer is YES | Likely direction |
|---|---|---|
| Can the requirement be described precisely? | Suppliers can quote or bid against substantially the same requirements. | RFQ or ITB |
| Is a formal bid process required by policy? | The requirement is clearly specified and formal competition is required. | ITB may be appropriate |
| Does the buyer need competing technical approaches? | Bidders need to explain how they will deliver the required outcome. | RFP |
| Are technical requirements and specifications firm? | Offers can be assessed against predetermined specifications. | RFQ or ITB |
| Would price alone be insufficient to identify the appropriate supplier? | Technical quality, methodology, expertise, or solution quality is significant. | RFP may be appropriate |
| Does the procurement policy specify a particular method or threshold? | The organization's rules determine the permitted process. | Follow the applicable policy |
RFQ vs RFP vs ITB: Price and Technical Evaluation
One of the clearest ways to understand the distinction is to examine how the buyer expects to evaluate supplier submissions.
RFQ Evaluation
RFQ evaluation commonly emphasizes price after confirming that the quotation meets the stated technical, commercial, delivery, and other mandatory requirements.
For example, if an NGO requests quotations for standardized hygiene kits, the technical specifications may define the required contents, quantities, packaging, quality requirements, delivery location, and delivery date. Suppliers can then provide comparable quotations.
The exact evaluation methodology should always be stated in the solicitation and follow the organization's procurement rules.
ITB Evaluation
ITB evaluation commonly focuses on whether bids comply with the defined requirements and, among technically acceptable or compliant bids, which offer has the lowest evaluated price.
However, the phrase "lowest price wins" should not be interpreted as an absolute rule. A bid that fails mandatory technical, legal, commercial, eligibility, or other requirements may not be acceptable even if its price is the lowest.
The actual evaluation and award methodology must follow the criteria stated in the solicitation and the applicable procurement policy.
RFP Evaluation
RFP evaluation normally involves predefined technical and financial criteria. Depending on the procurement, the technical evaluation may consider:
- methodology;
- technical approach;
- understanding of the assignment;
- relevant experience;
- qualifications;
- staffing and key personnel;
- work plan and schedule;
- quality assurance;
- risk management; and
- other criteria specified in the solicitation.
Financial proposals are evaluated according to the methodology established in the RFP. The solicitation should clearly communicate the applicable evaluation criteria and, where required, their relative weighting or evaluation method.
Key principle: procurement teams should establish evaluation criteria before the solicitation is issued and apply them consistently. Evaluation criteria should not be created or materially changed after receiving quotations, bids, or proposals.
RFQ vs RFP vs ITB: Common Humanitarian Procurement Examples
| Hypothetical requirement | Possible method | Reason |
|---|---|---|
| Standard office supplies with clear specifications | RFQ | Suppliers can provide comparable quotations against defined requirements. |
| Standardized hygiene materials with fixed specifications | RFQ | The products can be described precisely and compared on a common basis. |
| Routine vehicle maintenance with clearly defined requirements | RFQ or ITB | The appropriate formal method depends on value, complexity, market conditions, and organizational policy. |
| Construction project with completed technical drawings and specifications | ITB may be appropriate | Bidders can compete against established technical requirements and pricing. |
| Third-party monitoring assignment | RFP may be appropriate | Methodology, expertise, staffing, quality assurance, and technical approach may require substantive evaluation. |
| Complex consultancy assignment | RFP may be appropriate | The buyer may need competing technical approaches and professional expertise. |
| Specialized equipment with firm technical specifications | RFQ or ITB | The appropriate method depends on the organization's rules, value, formality, market conditions, and risk. |
These are hypothetical examples, not mandatory classifications. The correct method must always be determined using the applicable procurement policy and the circumstances of the actual procurement.
Common Mistakes When Choosing a Procurement Method
1. Choosing the Method Based Only on Contract Value
Procurement value is often an important factor, but it is not necessarily the only factor. Organizations may also consider the type of requirement, complexity, market conditions, urgency, risk, and how clearly the requirement can be specified.
A high-value requirement may require an RFP if the buyer needs suppliers to propose different technical solutions. Conversely, a clearly defined requirement may be suitable for an ITB where the applicable policy permits it.
2. Treating the Cheapest Offer as Automatically Acceptable
The lowest price does not automatically mean that the offer should receive the award. Procurement teams normally need to establish whether the offer satisfies the mandatory requirements and evaluation criteria stated in the solicitation.
This is particularly important in humanitarian procurement, where technical quality, delivery capability, supplier eligibility, quality standards, and other requirements can materially affect programme delivery.
3. Using an RFQ for a Requirement That Needs Substantive Technical Evaluation
If the procurement depends heavily on methodology, professional judgment, technical capability, or alternative solutions, a simple quotation process may not provide an adequate basis for evaluation.
An RFP may be more suitable where suppliers need to demonstrate how they will achieve the required outcome and technical factors form a significant part of the evaluation.
4. Using an ITB When the Requirement Is Not Sufficiently Defined
An ITB generally works best when suppliers can respond to clearly established requirements. If the buyer has not defined the requirement sufficiently and expects suppliers to develop different approaches, an RFP may provide a more appropriate evaluation framework.
5. Assuming That One Organization's Threshold Applies Everywhere
Procurement thresholds are organization-specific. A threshold used by one UN agency, NGO, donor, or country office should not automatically be applied to another organization.
Procurement professionals should always verify the current applicable procurement manual, delegation of authority, donor requirements, and relevant country or programme procedures.
6. Changing Evaluation Criteria After Receiving Offers
Evaluation criteria should be established before the solicitation is issued and communicated to prospective suppliers as required by the applicable procurement procedure.
Changing the criteria after receiving offers can undermine fairness, transparency, consistency, and auditability. Procurement teams should evaluate submissions according to the criteria and methodology established in the solicitation.
7. Choosing a Procurement Method Because It Is More Convenient
The easiest administrative method is not necessarily the most appropriate method. A procurement process should be proportionate to the value, complexity, risk, and evaluation needs of the requirement.
Using an unnecessarily complex RFP for a straightforward purchase can waste time and resources. Conversely, using a simple quotation process for a technically complex assignment can create significant evaluation and contract-performance risks.
What About Procurement Thresholds?
Thresholds are important, but there is no single universal RFQ, RFP, or ITB threshold that applies to every humanitarian organization.
Different organizations establish their own financial thresholds and procurement procedures. Those rules can also change over time. International organizations such as UNDP, WHO, and UNHCR publish their own procurement frameworks and procedures.
Therefore, procurement staff should not select an RFQ, RFP, or ITB solely because a generic online guide says that a purchase falls within a particular dollar range.
Instead, check:
- the organization's current procurement manual;
- the applicable financial threshold;
- the delegation of authority;
- the nature and complexity of the requirement;
- the available market and level of competition;
- the applicable donor or grant requirements;
- country-specific or programme-specific requirements;
- the required evaluation methodology; and
- the required approval and documentation process.
Practical rule: Never rely on a threshold copied from another organization without checking the current policy that governs your procurement.
What If the Procurement Is Urgent?
Urgency can influence the procurement approach, but it does not automatically mean that an organization can bypass normal competition.
Humanitarian emergencies may create situations where standard procurement timelines are difficult to meet. In such circumstances, the applicable procurement policy may contain emergency or exceptional procedures.
These procedures may require appropriate justification, authorization, documentation, competition where practicable, and compliance with applicable donor or organizational requirements.
Procurement staff should therefore avoid assuming that an emergency automatically permits direct contracting, single sourcing, or another exceptional method. The specific emergency provision in the organization's current procurement policy should be checked before proceeding.
What If Only One Supplier Can Provide the Requirement?
If only one supplier can reasonably provide a requirement, the situation may fall under a direct contracting, single-source, or other exceptional procurement procedure, depending on the organization's rules.
This is different from choosing between RFQ, ITB, and RFP because those are competitive solicitation methods.
A single-source justification should normally explain why competition is not available or appropriate and obtain the approvals required by the applicable policy.
Possible circumstances may include proprietary technology, compatibility with an existing system, exclusive rights, or other circumstances recognized by the organization's procurement rules. The justification should be based on the actual circumstances rather than simply the preference of the requesting department.
Do Donor Requirements Affect the Procurement Method?
Yes. Donor and grant requirements can affect procurement, but it is too broad to say that donor rules automatically "override" an organization's procurement manual in every situation.
Procurement staff should review the applicable grant or funding agreement, donor requirements, organizational procurement policy, delegated authority, and relevant local requirements.
Where requirements differ or appear to conflict, the appropriate procurement, grants, finance, legal, or compliance authority should be consulted before proceeding.
The key principle is to determine which rules legally and contractually apply to the specific procurement and document the basis for the selected method.
How to Document the Choice of RFQ, RFP, or ITB
A strong procurement file should make it possible for an independent reviewer or auditor to understand why the selected solicitation method was appropriate.
Depending on the organization's procedures, the procurement file may include:
- approved purchase requisition or procurement request;
- description of the requirement and specifications;
- estimated procurement value;
- market assessment or market research, where required;
- justification for the selected procurement method;
- applicable threshold and policy reference;
- solicitation document;
- evaluation criteria;
- supplier quotations, bids, or proposals;
- technical and financial evaluation records;
- approval documentation;
- award recommendation;
- purchase order or contract; and
- any required communication, debriefing, or complaint records.
The exact documentation requirements depend on the organization's procurement framework. The objective is to create a clear audit trail showing that the procurement method, competition, evaluation, approval, and award were handled consistently with the applicable rules.
A Practical Procurement Tip
When deciding between an RFQ, ITB, and RFP, do not begin with the acronym. Begin with two questions:
- How clearly can we define the requirement?
- How do we need to evaluate competing offers?
If every supplier can respond to essentially the same fixed specification, an RFQ or ITB may be appropriate depending on the applicable policy, value, and formality of the process.
If suppliers need to develop different methodologies, technical approaches, or solutions, an RFP may provide a better framework for evaluating technical quality alongside financial considerations.
This approach helps procurement teams avoid selecting a solicitation method simply because it is familiar or administratively convenient.
RFQ vs RFP vs ITB: Simple Rule of Thumb
For a quick starting point:
- RFQ: "The requirement is clear, and suppliers can provide comparable quotations."
- ITB: "The requirement is clearly and formally defined, and suppliers can bid against established specifications."
- RFP: "We need suppliers to propose how they will meet the requirement, and technical quality or methodology is a significant part of the evaluation."
Then apply the organization's actual procurement rules, thresholds, approval requirements, donor conditions, market considerations, and risk controls.
Frequently Asked Questions
Is an RFQ the same as an ITB?
No. Both can be used for clearly defined requirements, but they are not necessarily interchangeable.
In many procurement frameworks, an RFQ is a less formal solicitation method, while an ITB is a formal bidding method. However, the distinction, thresholds, evaluation methodology, and approval requirements vary by organization.
Is an ITB always for large purchases?
No. Procurement value can influence whether an ITB is required or permitted, but the size of the procurement is not the only consideration.
ITBs are generally associated with requirements that can be clearly and precisely defined and evaluated against established specifications. The applicable organization's procurement policy determines the relevant thresholds and procedures.
Is an RFP only used for consultancy services?
No. Consultancy and professional services are common examples, but an RFP may also be appropriate for other complex requirements where the supplier's technical approach, methodology, expertise, or proposed solution forms an important part of the evaluation.
Is the Lowest-Priced Offer Always the Winner in an RFQ?
Not automatically. The quotation must first satisfy the requirements and evaluation criteria stated in the solicitation.
In many procurement frameworks, the award is made to the lowest-priced technically acceptable or compliant offer, but the exact methodology depends on the applicable procurement rules.
Is the Lowest-Priced Bidder Always the Winner in an ITB?
Many ITB processes are designed around clearly defined requirements and award to the lowest-priced technically compliant or acceptable bid. However, the actual evaluation and award must follow the criteria and methodology stated in the solicitation and the applicable procurement policy.
Why Is an RFP Different From an ITB?
The main distinction is how the supplier's response is evaluated.
An ITB is generally appropriate when the buyer can define the requirement precisely and compare bids against established specifications. An RFP is generally more appropriate when the buyer needs suppliers to propose a technical approach, methodology, or solution and technical factors form a significant part of the evaluation.
Can an RFQ Include Technical Criteria?
Yes. An RFQ can include technical specifications, mandatory requirements, delivery requirements, commercial terms, and other predefined criteria.
The important distinction is that the requirement should be sufficiently clear for suppliers to provide comparable quotations, and the evaluation should follow the criteria stated in the solicitation.
Can an Emergency Procurement Use an RFQ, ITB, or RFP?
It depends on the circumstances and the organization's emergency procurement provisions.
Urgency may affect the permitted procedure or timeline, but procurement staff should follow the specific emergency rules, approval requirements, competition provisions, and documentation requirements applicable to the organization and funding arrangement.
What Is the Best Procurement Method?
There is no universally best procurement method.
The appropriate method is the one that fits the requirement, market conditions, procurement value, evaluation needs, risk, urgency, and applicable organizational and donor rules.
The objective is to use a procurement method that provides an appropriate level of competition and evaluation while achieving value for money, transparency, fairness, and compliance.
Conclusion
RFQ, RFP, and ITB are different procurement solicitation methods designed for different procurement circumstances. The key distinction is not simply whether a procurement is small, medium, or large.
An RFQ is generally appropriate when the requirement is sufficiently clear for suppliers to provide comparable quotations. An ITB is generally suited to formal competitive bidding where the requirement is clearly and precisely defined. An RFP is generally more appropriate when suppliers need to propose a technical approach, methodology, or solution and technical evaluation is an important part of selecting the successful offer.
For humanitarian and development organizations, the final decision should always be based on the organization's current procurement policy and applicable donor requirements. Procurement value, complexity, market conditions, urgency, risk, and the nature of the requirement should all be considered before selecting the solicitation method.
The best procurement method is therefore not simply the fastest method or the one with the lowest administrative burden. It is the method that provides an appropriate, transparent, competitive, and defensible process for achieving value for money and selecting the right supplier for the specific requirement.
Author's Practical Perspective
In humanitarian procurement, selecting the right solicitation method is ultimately about matching the procurement process to the requirement.
A procurement team should be able to explain, before launching the solicitation, why the selected method is appropriate, how suppliers will be evaluated, which policy permits the method, and what documentation will demonstrate a fair and transparent process.
When these decisions are made carefully, RFQs, ITBs, and RFPs become more than administrative documents. They become tools for managing procurement risk, strengthening competition, achieving value for money, and supporting effective humanitarian programme delivery.
Always verify the current procurement policy, applicable thresholds, donor requirements, and delegated authority before selecting or issuing a solicitation.
Recommended Official Procurement References
- UNDP Procurement: Organization-specific guidance on procurement methods and solicitation procedures.
- WHO Procurement: Procurement principles, processes, and supplier information.
- UNHCR Procurement: Supplier bidding opportunities and organization-specific procurement procedures.
- UN Procurement Manual: Guidance on solicitation methods, procurement procedures, and applicable requirements within the UN system.