Delivery delays are not because engineers are lazy or clients are difficult. After more than a decade in custom development, we have broken down the causes of delay into three almost unavoidable truths.
After more than a decade in custom software, the question we hear most often is: why is it delayed again? We used to blame requirement changes, but after reviewing hundreds of delayed projects, we found that the real causes are just a few and almost unavoidable.
Truth 1: Requirements are written clearly in the document, but the "why" is not
The "Requirements Specification" clients provide is often thick, but it is full of "what to do" and rarely says "why do it this way." The development team follows the document, and halfway through, the client realizes it is wrong—not because development did it wrong, but because the person who wrote the document had not thought through the underlying business logic.
Our current approach is to hold a round of "why" sessions after project initiation: every core feature must answer three questions—who uses it, what trouble it solves, and what happens if it is not done. Requirements that cannot answer these are put on hold until they are clear. Spending two or three extra days here can save two months of rework later.
Truth 2: Acceptance criteria are vague at kickoff
Many projects only say "build according to requirements" at kickoff, but no one says who judges "done" and by what standard. As a result, acceptance becomes a tug-of-war: the client thinks the interface is not smooth, while development thinks all features are complete.
The solution is not complicated: break acceptance into smaller nodes, with two-week iterations, and at the end of each iteration conduct an on-site demo, confirm on the spot, and sign for the record. Anything changed after confirmation follows the change process, and both parties honor it. This is far more reliable than saving everything for a one-time acceptance at the end.
Truth 3: Key stakeholders "disappear" midway
The biggest fear in custom projects is not too many requirements but losing contact with the decision-maker midway. The business owner goes on a two-week business trip, approvals get stuck, and the development team waits; when they return, the direction has changed.
We write one rule into the project charter: each phase must designate a contact person with decision-making authority, and a response time limit is agreed; exceeding the limit is deemed default approval. It sounds impersonal, but it is responsible for the project. Projects that drag to death almost always die waiting, not in the code.
Front-loading delay risks is more useful than rushing
Ultimately, custom software delays are not a technical problem but a management problem. If the why of requirements, how acceptance is judged, and who makes decisions are thoroughly discussed before kickoff, project progress can be at least half stabilized. Shenzhen Dushi Technology has been doing custom development for 16 years and has distilled this process into its own delivery methodology. Interested friends are welcome to talk with us about projects you are working on.