FirstTimeRightRate

FirstTimeRightRate is a performance metric used to assess how often a process produces a correct or acceptable result on the first attempt, without the need for rework, corrections, or additional intervention. It focuses on the accuracy and efficiency of completing work in a single pass rather than through multiple cycles.

The metric is typically expressed as a percentage and calculated by dividing the number of units, tasks, or cases completed correctly on the first attempt by the total number of units, tasks, or cases, then multiplying by 100. For example, if 980 out of 1000 units pass inspection on the first pass, the FirstTimeRightRate would be 98%. The numerator and denominator should reflect a clearly defined scope of work to ensure consistent measurement across time periods and teams.

FirstTimeRightRate is used across industries, including manufacturing, logistics, software development, and service delivery, to monitor quality and process capability. Data for the metric comes from production logs, quality records, defect tracking systems, or case management tools. It supports process improvement initiatives, such as Lean and Six Sigma, by highlighting opportunities to reduce rework, shorten cycle times, and improve customer satisfaction. It can inform performance benchmarking, goal setting, and incentive programs, provided definitions of “first attempt” and “rework” are standardized.

Limitations include sensitivity to how rework is defined, potential misclassification of defects, and the possibility that focusing solely on first-pass results may overlook improvements that require some initial adjustments. Related metrics include First Pass Yield and First Contact Resolution, which apply in different contexts.