Why Upper Specification Limits Matter in Process Improvement
Feb 6, 2025 · Benefits to the USL Seeing Where It Compares with the Upper Control Limit If the upper control limit is higher than the upper specification limit, then the process can be considered capable, …
Calculate Capability Indices with Only One Specification
Feb 11, 2025 · USL, upper specification limit; LSL, lower specification limit. *Estimated sigma = average range/d2 Common understanding includes the fact that Cpk climbs as a process improves – the …
Lower Specification Limit (LSL): Get to Grips with Your Production
Oct 13, 2024 · What is the lower specification limit? Find out how this measurement applies to your production and clues you into your processes.
Cpk vs. Sigma Level: What’s the Difference? - isixsigma.com
Feb 18, 2025 · Cpk = min (USL-mean/3σ, mean-LSL/3σ) This means that Cpk is equal to the minimum value of these two calculations. For example, if USL-mean/3σ gives you 1.16 and mean-LSL/3σ …
Ppk: A Critical Component of Quality Management Systems
Feb 10, 2025 · Ppk stands for Process Performance Index and is used for long-term variability.
Getting the Most out of a Capability Analysis - iSixSigma
Apr 23, 2012 · Many articles describe the difference between the process capability indices simply: one is short term, one is long term. Moving beyond such a description, this article focuses on the …
Cp, Cpk, Pp and Ppk: Know How and When to Use Them
Oct 10, 2024 · These represent categorical variables, which by definition carry an ideal USL of 100 percent error-free processing, rendering the traditional statistical measures (Cp, Cpk, Pp, and Ppk) …
A Guide to Control Charts - iSixSigma
Jan 28, 2025 · How do you know which control charts to use for an improvement project? Our guide can help you identify which works best for your needs.
How to Calculate and Utilize Upper Control Limit - iSixSigma
Jan 30, 2025 · Mastering the upper control limit is unlocking the potential for your SPC. Learn how to leverage this effective tool during your analysis.
How to Calculate Process Sigma - iSixSigma
Jan 29, 2025 · How do you calculate a process sigma? Finding this calculation is instrumental in improving your process quality, find out how in our guide.