Calculating Gage R&R in Excel. 1) This spreadsheet allows the user to perform a complete Gage Repeatability and Reproducibility (GR&R) study. Be careful! The spreadsheet will count the number of parts and appraisers automatically. When to use this spreadsheet. Engineering Forum (ANSI) • Plain gauges according to ISO standards up to 500 mm, according to ASME standards up to 19.69 You don’t need special software like Minitab. If … Click Create Custom Combo Chart. White cells are for data entry, yellow cells provide instruction, turquoise cells are headings and light green cells display data that can't / shouldn't be changed. The “Ultimate Kick Tolerance Calculator” (UKTC) was developed by Frank French C. Eng. Say operators are checking a shaft diameter on the computer numerical control (CNC) lathe after the manufacturing process is complete. The GR&R is reported in terms of percent of study variation and percent of tolerance. So how far off can the center actually be? // --> An Xbar and R chart is shown as well as Multi-vari charts showing Part Variation, Operator Variation and Part - Operator Interaction. Before reading the detailed description of the calculations it is recommended that you download the Gage R&R Spreadsheet Example. The Excel workheets from someone else may have used 6 (or 5.15) standard deviations, so when you past those values into your program based on 1 standard deviation, they don’t match. • Calculation of threads with nominal sizes from 0.25 mm up to 1250 mm (0.1 - 50 in.) tolerance to the target to obtain my Lower Spec.