Teams should create a written control plan for process owner to help owner and team track and respond to KPIs so process remains improved

Control plans can be spreadsheets, digital docs, or hard copy docs

Control plans include: company/ dept name, name of person who create plan, data plan was created, name of person who last edited plan, date plan was last edited, project/ process name, process owner, list of process steps where control action is required, CTQs associated with each action, limit specifications, unit of measurement, method of measurement, sample size, frequency of measurement, person responsible for measurement, where information is recorded, correction actions, and associated policy and procedure documents

Control chart elements: Line chart of data with plot points for specific data points, x-bar line representing average of data points, lines above and below x-bar line representing 1,2, and 3 standard deviations from median in either direction, upper control limit line 3 sd above media, lower control limit line 3 sd below median

Test 1: single point on control chart appears outside of ucl and lcl, can cause major problem

Test 2: 9 points in a row appear on one side of center line, change occured in process

Test 3: 6 points on control chart increase or decrease in row, process is becoming less or more efficient

Test 4: 14 points on control chart in a row alternate moving up and down, variation in machines, employees etc.

Test 5: 2/3 points in a row on control chart are in upper a or lower a section, special cause causing high variation

Test 6: 4/5 points in a row on control chart are in upper b section or lower b section, problem of major causation or shift

Test 7: 15 points in a row are located within C section above or below center line, control limits are no longer relevant to process

Test 8: 8 points in a row are on control chart located on either side of center line but none are located in c section above or below line, issue of mixed resources or processes