When Is the best time to use PC Items and Provisonal Sum Allowances?

When is the best time to use PC Items and Provisonal Sum Allowances? There is a lot of needless anxiety when it comes to utilising PC Items and Provisional Sums. We detail how effective these are during the design development, so as to ensure the project is sync with its budget. This enables the project to proceed with certainty before going to the gretaer expense of additional detailing.