Since the beginning of the nineties awareness has grown that the costs during use and maintenance of information systems exceed the initial development costs by far. The existing literature on testing and test methods provides sufficient grip on testing of new software applications. Therefore, it is all the more striking that in literature very  little can be found on the topic of testing in maintenance situations. With this document we attempt to fulfil the needs of many that deal with testing during maintenance on a regular basis. For this we employ the structured test methodology TMap® as a basis, and give the differences for testing during maintenance. Testing during maintenance is not a new work area. On the contrary; for many people it is a daily routine. The advantage of this is that a lot of practical experiences are available, and these experiences are incorporated in this document.

Testing in Maintenance situations