SpecMaster Worksheet Features
The SpecMaster worksheet is accessed from the Parameter Bias Uncertainty Worksheets and from the Parameter Templates.  It is a tool for developing tolerance limits for parameters with complicated specifications.  Such parameters are common in electronic and microwave equipment and plague users of pressure measuring systems as well.

The SpecMaster worksheet can also be used to identify the manufacturer of the item whose parameter is under consideration, the model number, the description, the parameter name and qualifiers, the measurement area, the nominal units, the tolerance units and the tolerance type (two-sided, single-sided upper, single-sided lower, etc.).  Identifying information or an algorithm for computing tolerance limits and specification data may be entered or retrieved from specification files.

Equations for the tolerance limits are entered in the Upper Limit Equation and Lower Limit Equation boxes.  The Tolerance Algorithm is entered in the area below these boxes.  The Specification Data are entered in the table in the lower part of the worksheet.  The computed tolerance limits are shown in the Upper Tolerance Limit and Lower Tolerance Limit boxes at the bottom of the worksheet.  The displayed precision for these quantities can be adjusted using the Desired Precision arrows at the lower right of the worksheet.

Tolerance algorithms are developed using a simple but powerful scripting language called VBScript.  If you have used spreadsheet applications, such as Microsoft Excel, or worked with Visual Basic, you will find the rules for VBScript to be similar to the rules you are already familiar with. 

A fairly comprehensive guide to VBScript is contained in a Help file accessed by selecting VBScript (Equation Support) from the SpecMaster Help menu.  There is also a direct link to available mathematical functions listed in the Math Functions section of the Help file.  The Math Functions page of the Help file shows functions that are intrinsic to VBScript and those that have been added for use in UncertaintyAnalyzer.