An EPC Project is divided into various phases as say Civil Work, Equipment Erection, Electrical Installations etc. These phases are drilled down to various activities, for e.g. Civil work is divided into site preparation, excavation, foundation, brickwork etc.
My question is whether it would be right to define Civil Work phase as WBSe and the activities under civil work as ext. activities? Further it is required that only one PR and PO to be raised for Civil Work and no PR should be raised for ext. activities listed under Civil Work. I understand that PR will be raised for ext. activities, which is to be avoided. Request inputs in the matter with alternative solutions.