When it comes to Project Planning, many project managers think that they can manage the program themselves without the help of a professional planner but they realise their limitations as the project progresses and given the vast number of variables related to each activity it becomes more & more difficult to manage the programs. The attached image shows how many types of attributes are related with each activity in Primavera P6 and the no. of variables under each of them are just limited by the requirements of the project. Having more baselines keeps you more busy as variables just multiply.