I am a 78 year old contract developer, maintaining/developing a medium size system +- 200 modules. it takes me about 4-5 hours a day which is fine! Experience t

I am a 78 year old contract developer, maintaining/developing a medium size system +- 200 modules. it takes me about 4-5 hours a day which is fine! Experience teaches you to tread carefully with critical systems (and people). There really is no need to work 10-12 hour days! Unless it is an unforeseen disaster this usually means you are not very well organized! The "bright young things" are busy rewriting this system in mvc c# etc, which I help with in a minor role. This has been going on for 9 years with very little signs of completion! Not only have local developers been involved but also software companies in Russia and India have been involved! Developers have grown old on this project (including me!). So whatever malaise has hit this project it seems to be international. My background on projects is mainly using the "waterfall" approach. My customers wanted a fixed price and so must have a fixed specification. I however appreciate the agile approach as being more flexible and reactive. But both methods must require users and developers to think through the problem and draw up at least a framework of requirements? This hasn't happened on this project and probably accounts for the slight overrun!