Five years as an example is probably the outer limit and so it supports your case well. But I've seen badly designed software cost twice as much to put right (c

Five years as an example is probably the outer limit and so it supports your case well. But I've seen badly designed software cost twice as much to put right (compared to putting the effort in at the start) within a few months. It's a false economy over and over but that gets buried in all the drama that follows.