It is important to make changes to objects in a very well-organized and tightly-controlled manner. In most situations, only one developer at a time will make changes to an object. If an object needs to be changed for multiple purposes, the first set of changes should be fully tested (at least through the development testing stage) before the object is released to be modified for a second purpose.
If the project is so large and complex or deadlines are so tight that this one modification at a time approach is not feasible, we should consider the use of software source management systems, such as the Git or Team Foundation systems, which can easily help you separate multi-modifications.
Similarly, we should only be working on one functional change at a time. As developers, we might be working on changes in two different systems in parallel, but we shouldn't be working on multiple changes in a single system simultaneously. It's challenging enough to keep all...