Practice technical specification vocabulary: spec scope, review-before-implement, deviations, assumptions and constraints, and stakeholder sign-off.
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A team process says 'The technical spec covers design, API, and testing.' Why include all three in a single spec?
A comprehensive technical spec aligns the team on the full solution before implementation. Design covers internal structure; API covers external contracts; testing covers acceptance criteria. Together they ensure implementation, API consumers, and QA are aligned — preventing mismatches discovered after the code is written.
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Your team's process requires 'The spec is reviewed before implementation.' What is the benefit of reviewing before coding?
Changes to a spec are cheap — a comment and a document edit. Changes to implemented code are expensive — refactoring, testing, updating APIs. Pre-implementation review is the most cost-effective quality gate. It finds gaps, catches ambiguities, and surfaces concerns before any implementation investment is made.
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A spec note says 'The implementation may deviate from the spec if needed.' What should a developer do when they deviate?
Deviating from the spec without documenting it creates a dangerous gap — the spec says one thing, the code does another, and future maintainers are misled. When deviation is necessary, update the spec to reflect the actual implementation and explain why the deviation was made.
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Your spec template includes 'assumptions and constraints.' What is the purpose of documenting assumptions?
Undocumented assumptions are one of the most common causes of technical problems. 'We assumed the external API would always return in under 200ms' is a classic undocumented assumption that creates fragile systems. Documenting assumptions makes them challengeable and creates a checklist of things to verify.
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A spec process includes 'stakeholder sign-off.' Who are typical stakeholders for a technical spec sign-off?
Stakeholder sign-off ensures all affected parties have reviewed and agreed to the plan. Technical specs typically involve: implementing engineers (confirming they understand and agree), a tech lead/architect (confirming technical soundness), product management (confirming requirements are met), and cross-functional partners whose systems are affected.