yeah it is one of the principles in the agile manifesto. http://agilemanifesto.org/principles.html http://agilemanifesto.org/principles.html "Agile processes pr

yeah it is one of the principles in the agile manifesto. http://agilemanifesto.org/principles.html http://agilemanifesto.org/principles.html "Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely."