In the spreadsheet module for ReliaSoft Workbooks in Weibull++ and BlockSim, you can insert functions that perform math, date, logic and other operations.
The quickest way to add a function is to select it from the appropriate function category drop-down list, then select the cells of interest (hold down the CTRL key to select nonconsecutive cells) and press ENTER. You can move and/or modify the function expression after it has been inserted.
For example, to calculate the average reliability for the following units, you would choose Formulas > Function Library > AutoSum > Average. Select cells B3 through B9 and press ENTER. Note that the cell references can be relative (B3:B9) or absolute ($B$3:$B$9). (See Referencing a Cell.)
To use the Function Wizard, choose Formulas > Function Library > Insert Function.
Select a function from the drop-down list and click OK. Then in the Function Argument window, enter the input by either selecting the cells in the sheet or typing them directly into the appropriate field. For information relating to entering text as an input, cell references, and working with date and time functions, see Data Entry Tips for Functions.
For example, to exclude the value from unit 4 (failure due to operator error) from the average, you would select cells B3 through B5 for Number 1, and B7 through B9 for Number 2.