The Yield Report displays the results of a Monte-Carlo analysis performed on the system to which the report is attached. This type of analysis repetitively solves the system while randomly assigning values at each iteration to those component parameters having user-defined tolerances. The results of each analysis are compiled to show the statistical performance of the system over the entire sample count. Additionally, pass/fail information is accumulated and displayed for each system parameter that has user-defined limits. To use this report, at least one component in the current system or linked pages must have parameter tolerances defined.
The Sample Count edit control allows you to specify how many samples will be considered during the analysis. Each sample represents one complete analysis of the system including adjustments for AGC control and compression effects. The larger the count the longer the analysis will take to perform. The yield analysis is initiated by clicking the Start button. The indicator at the bottom of the report will display the progress of the analysis.
The SysCalc displays the mean, standard deviation, minimum and maximum values resulting from the analysis for the parameter shown in the Yield table shown below. Not all system parameters automatically show up in the Yield table. For instance, if no component throughout the system has either NF or Te defined, then NF and Te will be excluded from the display. Additionally, you can customize which parameters you want displayed using the Select Parameters to Display dialog box shown below.
The Yield table allows you to enter pass/fail limits for each system parameter. For each limit specified, a corresponding fail result will indicate the number of samples that actually exceeded the limit. The total number of failures for a parameter is also expressed as a percentage. Finally the total unit failures are indicated above the Yield Table. A single unit failure indicates that the sample failed one or more limit specifications; thus the total parameter failures are greater than or equal to the number of unit failures.
The following menu is displayed when you right mouse click on the table. Using the menu, you can add or delete an row from the table.
By clicking the Display button on the Yield Report, the following dialog is invoked. Using the tree control, you can select those parameters that you wanted displayed in the Yield Table. Click the Save As Default button to cause all new Yield Reports to display the currently checked parameters by default.