Contribution of Walter Andrew

Shewhart

Group Members

• Anuraj Babu MS111203• Vishal Joshi MS111215• Gajanan Kini MS111218• Santosh Kurade MS111221• Umesh Panaskar MS111228• Aditya Thakur MS111244• Ratnesh Waghmare MS111280

Walter Andrew Shewhart A Brief Of The Grandfather Of TQM

• Walter Andrew Shewhart, American physicist, engineer & statistician.

• Birth, March 18, 1891.

• He attended the University of Illinois .

• In 1918, Shewhart joined the Western Electric Co. in Hawthorne

Contribution of Mr. Shewhart

• He had been working to improve the reliability of their transmissions systems.

• On May 16, 1924, Shewhart prepared a memorandum of less than one page in length.

• 1/3 of the page was devoted to a simple diagram that we would today recognize as a control chart (SPC control chart).

• The Hawthorne studies.

Shewhart Cycle

• The Shewhart cycle combines management thinking with statistical analysis.

• Also called Plan–Do–Study–Act (PDSA) cycle.

• The Shewhart cycle has the following four stages:Plan: identify what can be improved and what change is neededDo: implement the design changeStudy: measure and analyse the process or outcomeAct: if the results are not as hoped for

PDCA Cycle

Reducing Variation: Statistical Process Control

• The focus was on reducing variation as a way to improve quality.

• Shewhart identified two categories of variation.“Assignable‐cause”“Chance‐cause”

• He devised the control chart as a tool for distinguishing between the two.

Conclusion

Shewhart stated :-“The object of industry is to set up

economic ways of satisfying human wants and in so doing to reduce everything possible to routines requiring a minimum amount of human effort. Through the use of the scientific method, extended to take account of modern statistical concepts, it has been found possible to set up limits within which the results of routine efforts must lie if they are to be economical.“