Viết tài liệu đặc tả yêu cầu

Tuy Hình ảnh một phần mềm được xây dựng thuần tuý từ lý thuyết là một ảo tưởng, nhưng Việc giả bộ là phần mềm được xây dựng bằng lý tính là có ích

Computer Specification

A specification of the machines on which the software must run. The machine need not be hardware-for some software this section might simply be a pointer to a language reference manual.

Input/Output Interfaces

A specification of the interfaces that the software must use in order to communicate with the outside world.

Specification of Output Values

For each output, a specification of its value in terms of the state and history of the system’s environment.

Timing Constraints

For each output, how often, or how quickly, the software is required to recompute it.

Accuracy Constraints

For each output, how accurate it is required to be.

Likely Changes

If the system is required to be easy to change, the requirements should contain a definition of the areas that are considered likely to change. You cannot design a system so that everything is equally easy to change. Programmers should not have to decide which changes are most likely.

Undesired Event Handling

The requirements should also contain a discussion ,of what the system should do when, because of undesired events, it cannot fulfill its full requirements. Most requirements documents ignore those situations; they leave the decision about what to do in the event of partial failures to the programmer.