Reuse

The focus of reuse is to find the difference between the new and the old case, and find what part of the old case that can be used in the new case. It either involves copying the old solution or adapting it:

• Copy - in simple classification, the differences between the old and new case are abstracted away, and the solution is simply copied from the old case.
• Adapt - either the solution itself can be (transformed and) reused, or the past method that produced the solution can be used.