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| writing_a_technical_brief_that_earns_a_reliable_estimate [2026/09/22 00:22] – created eltonoliva | writing_a_technical_brief_that_earns_a_reliable_estimate [2026/09/23 21:05] (current) – created juliannegaertner |
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| Open with the reason this [[https://webparadox.com/services/edtech/|education software development company]] should exist, not a feature list. Who will use it day to day, how many times a day, and what does the process look like without it? An estimator who understands the goal will suggest an alternative that costs less; someone handed only a feature list will price the list as written. | Start with the reason this [[https://webparadox.com/how-we-work/|software outsourcing models]] should exist, not your preferred technology. What kind of user will use the system, how often, and [[https://webparadox.com/pricing/|how much does it cost to build an app]] is the job done today? An estimator who understands the goal often proposes a cheaper route to it; someone handed only the requirements as given will price exactly what you asked for. |
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| Define what is included as concrete flows: what the user does and what the system does in response. Every bit as useful, list what is out of scope. An explicit list of exclusions saves more friction later than almost anything else in the document. Indicate as well which items are decided and which are still under discussion — the difference changes the price, and pretending everything is fixed helps no one. | Set out the scope as short scenarios: a walk through each important path. Just as important, state explicitly what you are not building. An explicit exclusion list removes more argument later than almost anything else in the document. Mark too which decisions are settled and which may still change — the difference changes the price, and hiding it helps no one. |
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| List the constraints. These include the platforms and services involved, the data you already hold and its condition, regulatory obligations, user volumes, target platforms and any technology you are committed to. If there is a hard date, explain what drives it: a good team can often rearrange the plan to hit it, but not if the date is a secret. | Write down the hard constraints. This means systems you must integrate with, existing databases and their quality, regulatory obligations, expected load, which devices matter and infrastructure that is already decided. Where a date is genuinely fixed, say what depends on it: an experienced team can often resequence the work to hit it, but not if the date is a secret. |
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| Say what the word done means for each item. Clear acceptance criteria do not need any formal notation: a short list setting out what a user should be able to do is enough. This one section compresses the sign-off process [[https://webparadox.com/industries/|software development by industry]] a surprising margin and eliminates the usual argument at handover. | Write down what completion means for each item. Acceptance criteria do not require any formal notation: a short list describing what must be true when the feature works is enough. This single habit shortens the sign-off process dramatically and removes most late-stage disagreement. |
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| One last thing, say what you expect back. Require an itemised estimate, [[https://webparadox.com/hire/golang-developers/|hire redis developers]] a written list of assumptions, whatever the team considers risky and [[https://webparadox.com/services/mobile/|custom mobile app development services]] an optimistic and a pessimistic figure. Take a broad range as useful information rather than evasion: it normally identifies exactly which requirement is unclear. At that point tighten that section and ask again — the revised figure will be much more reliable. | One last thing, state what you want in the response. Request an itemised estimate, the assumptions used, the main risks and an optimistic and a pessimistic figure. Take a broad range as useful information rather than evasion: it usually points to exactly which requirement is unclear. Then tighten that section and request a revised number — the revised figure is the one worth planning around. |
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