Difficulties with maintenance

There are many difficulties that can arise from maintaining code as follows:

♦ It can sometimes be very difficult to maintain code that was written by another programmer. It might be difficult to discuss these problems with the original programmers, because they may have left the organisation, retired, or whatever.

♦ The code produced might be unstructured - or following no method as the person who produced it was a novice at the time! Code was produced in a previous standard of the implementation language.

♦ Poor, or no, documentation is likely to exacerbate maintenance difficulties.

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