Most of the projects fail because the scope has not been defined properly. What is scope? The main intent of the project. Scope is what are we going to build in our project. It is necessary to define the scope completely and clearly at the beginning. The scope should be measureable. If the scope is not defined properly, neither you know where you are heading nor you know whether you have reached the destination, your goal. After all the hard work, the client is not satisfied and may not accept and approve the deliverable. The success of the project depends on how complete is your scope definition and whether it is measureable. Anything which is not measureable is not done. Focus on the primary step of defining the scope, rest will fall in place All the very best !!!