Statistical Process Control According to W. Edwards Deming
8 days ago
- #Deming Cycle
- #Statistical Process Control
- #Quality Management
- W. Edwards Deming is known as 'The Father of Quality Management' and his work focuses on production processes, influencing fields like medicine and software development.
- Deming emphasized that performance issues are often due to the system, not individuals, advocating for managing the whole company as a system.
- He introduced experiments like the red bead experiment to demonstrate how individual performance is largely random within a system.
- Deming's ideas were initially ignored in America but were highly influential in Japan's post-WWII economic recovery.
- The Deming cycle (Plan-Do-Study-Act) is a key concept in project management, adapted from Walter Shewhart's work.
- Deming opposed inspection as a means to ensure quality, advocating instead for building quality into the product from the start.
- Statistical process control involves modeling production and loss functions to optimize processes by centering and reducing variance.
- Errors are categorized into common causes (random, part of normal variance) and special causes (assignable, singular events), each requiring different treatments.
- The funnel experiment illustrates the consequences of different strategies for handling errors, emphasizing the importance of not overcorrecting common causes.
- Control charts are used to distinguish between common and special causes of variation, helping to keep processes in control.