How to build a bid evidence library
A good bid evidence library lets a writer find the right fact, understand its limits and see who approved it. Store source material and a short explanation of what it proves, with dates and permissions. Keep old answers as examples, but do not treat them as approved facts. Start with the evidence your team needs most often and give each item an owner before adding large volumes of material.
Before you start
Who this helps
- A team repeatedly asking colleagues for the same information
- A business with old submissions but little source evidence
- A bid team preparing material for reliable search or AI-assisted drafting
Points to check
- A winning answer can contain outdated or unsuitable information.
- A metric needs its unit, period and scope to be reusable.
- Being able to open a document does not mean you may share it outside the business.
Start with recent questions and recurring gaps
Review several recent tender packs and feedback records. Identify the material you need again and again: service methods, comparable projects, performance results, people, policies and certificates. Note where writers had to chase information or use weak substitutes.
Choose a manageable first set. A small collection of approved, relevant records is more useful than importing every old folder and leaving writers to decide which version to trust. Add an item only when a real question needs it.
Create a record for each piece of evidence
Keep the source file with a short record describing the service, project, dates, your role and the claim it supports. Name the evidence owner and approver. Include the review or expiry date and any restriction on customer names or confidential details.
For a performance figure, record the calculation and its limits. For example, a record might say: “92% of 240 priority-two tickets met the agreed response target between April and June; excludes out-of-scope requests; source: approved quarterly service report.” The example shows the structure, not a Bidgen or client result.
- Record title and relevant service or response theme
- Source location, owner and approval status
- Scope, dates, units and important limitations
- Permission for use, sensitivity and review date
Keep facts, methods and old answers separate
A case study explains work completed. A delivery method describes how a service operates. A previous response shows how material was presented to one buyer. These can link to one another without becoming the same record.
When reusing an answer, go back to the evidence and check whether the new requirement is different. A dedicated manager promised on a larger contract may be unaffordable at the current price.
Make the right material easy to find
Use clear titles and a small, consistent set of tags such as service, sector, geography and question theme. Avoid relying on a customer’s name alone: a writer may be searching for “multi-site mobilisation” without knowing which project proves it.
Test the structure with an actual question. Ask a colleague to find the evidence, explain why it is relevant and identify the approving owner. If they cannot do that, improve the record before adding more content.
Protect sensitive information and keep records current
Restrict confidential records and define what may be used in a tender or shared with an external provider. Where personal information is involved, the ICO’s data-minimisation guidance requires it to be limited to what is needed for the purpose. A tender library should not become an unnecessary store of employee or beneficiary details.
Set review dates to suit the content. Certificates expire, staff roles change and performance figures need a stated period. Keep retired material separate and visibly marked so it is not mistaken for current evidence.
Make updating part of the bid and delivery routine
After submission, save any newly approved evidence and note the question it answered. After feedback, improve the records that proved weak. Ask delivery owners to add useful results as reports or projects are completed, rather than waiting for the next deadline.
An approved AI or search tool can help retrieve material, but permissions, source links and human checks still matter. This week, start with the few records your team most often struggles to find, name their owners and test them against a live question.
Common questions
01Where should the library live?
Use a system your team can access and manage, with the right permissions and version control. A shared workspace you already use can be enough to start with. Good records with clear owners matter more than a new product.
02Should we store entire past submissions?
Keep them as historical reference, labelled with the buyer, date and outcome. Link them to current source records. Do not assume their facts, commitments or wording remain approved for another tender.
03Who should maintain it?
A named library owner can coordinate the structure, while delivery, HR, finance and other specialists own the accuracy of their material. Writers should flag gaps and get approval rather than sign off operational facts themselves.
04How do we know it is working?
Test whether writers can find approved evidence that fits the question, see where it came from and use it accurately. Track repeat gaps and out-of-date records. Finding material faster only helps if the material is still right.