property development framework

I'm working in a really interesting property development business and I've been tasked with writing a rule book of how to manage the development and construction of new properties. I want the basis of a framework for how to ensure best quality and value for money when when managing a property development project, honing in on best practice, financial modelling to reflect true cost, procedures for ensuring sign off for contractors against agreed upon specifications, legal recourse and maintaing a culture of best in class at all levels.