You know - what. What remains - how.
The business side is clear. Features are in your head or in Excel files. But you're missing a document that would help potential vendors understand the task uniformly and provide accurate estimates.
Why is proper technical documentation necessary?
Mistakes in software project implementation happen when the task is unclear. Technical documentation/specification helps avoid interpretations.
The feature list looks complete — but it's not.
At first glance, a feature list may seem comprehensive. However, once you start examining how the system will work in real situations, missing scenarios, integrations, access controls, and exceptions become apparent. A technical specification resolves these questions before development begins — when changes are simpler and cheaper.
Clients haven't been consulted.
A few conversations with future users before preparing the technical specification help reveal real processes, exceptions, and needs that the initial feature list doesn't uncover. After these conversations, not only details change, but often the solution logic itself.
The market hasn't been evaluated.
Reviewing similar solutions makes it clearer what is actually needed for this specific project. This helps separate necessary features from excess, compare different operational models, and avoid copying everything competitors already do into the technical specification.
Three proposals — three differently understood projects.
If initial requirements aren't clear enough, each vendor fills the gaps in their own way. In the final stage, you're not comparing prices for the same result, but different scopes, assumptions, and solution logic.
Result.
Documentation that helps avoid inappropriate project assessments and interpretations.
Technical Specification.
We clearly define the system scope, key entities, processes, integrations, and exceptions. The document is prepared so that all vendors evaluate the same task, and their proposals can be objectively compared.
Functional Description.
We describe in simple and consistent language how the system will work from the user's perspective: what actions they will perform, what they will see, and how data will change. The document is understandable to both business and IT teams.
Budget Estimate.
We provide a justified and detailed project budget. We separately assess the biggest uncertainties and risks that may impact the final cost.
Risk Register.
We identify the most important project risks and their potential impact on project progress, budget, and timelines.
Assumptions List.
We document what is considered agreed upon or self-evident during project assessment. This reduces the risk that undiscussed assumptions will later become questions of additional scope, cost, or responsibility.
Selection Criteria.
The technical specification is about the project, and the selection criteria are about the most suitable team to implement it.