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Capability Studies & Statistical Analysis

Statistical Process Control

  • SPC
  • Gage R&R
  • PPAP


SPC (Statistical Process Control) is the statistical analysis of measurement data collected from a manufacturing process to determine its viability and make educated corrections to a process. SPC is an integral step in the production part approval process. Besides requiring a significant number of repetitive measurements (for which DCC-CMM’s are nearly indispensable) complex data compilation, analysis and interpretation are required. Q-PLUS routinely provides statistical results (such as Cpk, Cp, Ppk, Pp, Sigma level, etc.) supported by quantitative measurement data and depicted in a variety of graphical analyses. 


Capability Studies provide a greatly enhanced examination and validation of manufacturing processes. These are commonly utilized in high-production applications such as automotive, components and commercial products. Q-PLUS provides many types and degrees of capability studies tailored to any application or special customer requirements.


An important component of any comprehensive capability study is analysis of the measurement process itself. A Gage R & R (Repeatability & Reproducibility) study is a common way to determine what amount of error in a process is due to measurement uncertainty.


PPAP or Production Part Approval Process is a standard requirement in the automotive industry that occurs at the beginning of or after a change to a manufacturing process.

Recent News

Join Q-PLUS at WESTEC 2017

September 2017: Join Q-PLUS Labs at WESTEC 2017 in booth #2319 at the Los Angeles Convention Center in Los Angeles, CA - September 12th-14th. Come see our selection of metrology equipment, and discuss your specific needs for measurement products & services with our application engineers & staff. There's also a chance to win $500 in Q-PLUS Bucks! Click here for FREE admission (a $50 value).


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Q-PLUS Labs Expands 3D Scanning Arsenal with Big Investment in 3D Scanning

August 2017: Q-PLUS Labs' already impressive arsenal of 3D scanning equipment and capabilities expands even further with the addition of several systems from prestigious 3D scanning manufacturers. These additions will provide customers with repeatable, precise data and structured light scanning accuracies down to 3 microns. In addition to increasing Q-PLUS' array of 3D scanning capabilities, another investment was made to contribute to the company's service offerings for large structured light scanning with a highly advanced, high-end photogrammetry system. Ever committed to providing the best value to customers, Q-PLUS is currently in the process of developing the next level in cutting-edge 3D scanning automation, which we are excited to offer soon! Request a quote

3D Scanning Additions

Q-PLUS Labs Service Spotlight: Part Sorting & High Volume Inspection Services

July 2017: Did you know that Q-PLUS Labs offers Part Sorting and High Volume Inspection Services, both in-lab and on-site as a major division of its comprehensive dimensional measurement & inspection services? Mistakes can be costly, both in time and money, but our expertise can help get you back on track. We deploy experienced personnel and portable equipment to come to your aid at either your facility, your shipment's destination, or by diverting shipments to our lab. Don't let mistakes or out-of-control manufacturing processes prevent you from achieving your objectives, especially when it comes to maintaining your product's integrity, delivering good parts on-time, and preserving your reputation. Let Q-PLUS Labs help you with solutions such as part sorting and high volume inspection, part containment, minor part rework or repair, light assembly, and consulting with our experts to find creative solutions to vexing problems. With over 30 years of experience, we are veterans at deploying skilled and semi-skilled staff in small or large teams to provide accurate and speedy inspection services. Request a quote

Part Sorting Services