Chapter 4 SPREADHEET MODELLING WITH EXCEL STEP 1 PLANNING THE MODEL Developing the Conceptual Paper Worksheet (CPW) STEP 2: TRANSLATING THE CPW INTO A SPREADSHEET MODEL Cell referencing Saving a spreadsheet model: Entering the OUTPUTS Entering the TOT REV Column Absolute and relative addressing

STEP 3 TIDYING UP THE SPREADSHEET MODEL Adjusting the column widths Copying a formula Entering the TOT COST Column STEP 3 TIDYING UP THE SPREADSHEET MODEL Adjusting the column widths Formatting the contents of the cells Interrogating the model

STEP 4 CREATING A GRAPH Follow Step 1 to step 4--- THE CHART WIZARD ICON Making minor Changes to the graph Scaling of x-axis and y-axis Modifying The Model Creating a Copy of the Original Model Creating a copy of the original Chart Modifying the Original Chart

SOLVING SIMULTANEOUS EQUATIONS

Enter the data as shown below, (Fig 13). Solving the equations as a two stage process Stage 1: find the inverse of the A matrix Stage 2: multiply this inverse by the b matrix Solving the equations as a one stage process