1.17 The Spreadsheet is based on Procuring Authorities determining the correct input variables' values and then computing the impact of these, alongside the Spreadsheet's fixed inputs, to create the outputs. The Spreadsheet contains 6 sheets:
• an Instruction Sheet" with initial instructions,
• an Input Assumptions Sheet into which all input variables should be entered. The reasons for the input choices and the sources of information should be entered into this sheet,
• an Input Summary Sheet which can be printed and which shows both the variable inputs and the default "hardwired" assumptions. Users should not enter data into this sheet
• an Output - Indifference Sheet which contains the main outputs, switches to test the effects of changing key inputs, sand a graph showing how changing key inputs affects VfM
• Output - Stashed Scenarios where several scenarios can be saved, and
• a sheet to print all relevant tables and graphs .