Answer
In both the development and modification phases. The point is that modifications must be documented as thoroughly as the original program. (It is also true that software is documented while in its use phase. For example, a user of the system might discover problems, which, rather than being fixed, are merely reported in future editions of the system user’s manual. Moreover, “how to” books are often produced after the software has been in use for an extended period.
Work Step by Step
In both the development and modification phases. The point is that modifications must be documented as thoroughly as the original program. (It is also true that software is documented while in its use phase. For example, a user of the system might discover problems, which, rather than being fixed, are merely reported in future editions of the system user’s manual. Moreover, “how to” books are often produced after the software has been in use for an extended period.
