Items Tagged with 'control charts'

Over the last 20 years at conferences, I've noticed many improvement posters rely on line and bar charts, which aren't always effective. While some use control charts and histograms, they often miss illustrating the "before and after" of improvements. It's crucial to better showcase these changes with appropriate chart types.

A customer inquired about confidence intervals for capability indices, emphasizing their role in process capability reporting. The capability index, often represented by Cpk, estimates how well a process metric meets customer requirements.

Traditional control charting techniques, despite their long history, can lead to wasteful outcomes due to certain mathematical properties. This article examines these issues using a Minitab dataset and introduces a free 30,000-foot-level metric-reporting app as an alternative, supported by Minitab analyses.

The Xbar/R Control Chart is a method of Statistical Process Control (SPC) manufacturers can use to reduce fill weight variation, maintain centerlines and avoid rework. Here are best practices to keep in mind:

Early detection of small shifts in the manufacturing process enables you to react faster and fix the process, saving time and money.

An SPC (Statistical Process Control) Software customer recently inquired if I could discern any issues in a process, as their customer had identified problems with three recent shipments. They provided data for the customer’s current year shipments for a variety of KPI (key process indicators) in an Excel file. 

The holiday season is over. You made it! You can take a breath. You are ready for the hustle and bustle of 2020. There will be new projects, challenges, and successes.

Quality professionals know the value of good measurement systems. They know that without trustworthy, high quality data you cannot make good business decisions. Unfortunately, most business people and many engineers don’t understand this value.