Control Chart Pattern Detection

J

jhwatts

#1
I am a web developer that builds applications centered around business analytics and statistics. I have worked as a engineer and scientist for about the last 15 years in various laboratories across the country. I am very familiar with laboratory measurements, associated uncertainties, and instrument process control. I have basically developed a pattern analyzer algorithm that detects particular patterns forming as a stock price changes over time. Its fairly sophisticated. I am wanting to expand it to other applications. I have been then thinking that I can apply this algorithm to SPC. The algorithm can detect patterns that are associated with particular QC failures. Control chart software currently looks at single point or even a group of points outside of control bands. My software not only would detect a point outside the control limit and groups of points outside the control limits but how the points are orientated and if the are related to a particular pattern. This will allow particular patterns to be associated with certain process that affect SPC. I've never seen it and was wondering if anybody here knew any software out there can detect specific patterns in control charts. Also can anybody give me any thoughts about if something like this would be use full or be in demand.
 
Elsmar Forum Sponsor

Steve Prevette

Deming Disciple
Staff member
Super Moderator
#3
There are several variations on the rules out there, even something called zone control charts. But once you pick a set of rules it is pretty easy to program. Generally though I prefer that a human look at the chart. Even though they might miss a rule now and then, at least it guarantees someone has actually looked at the chart.

Just to prove it could be done, I programmed up the rules in Excel myself, and it does work okay.
 
J

jhwatts

#4
It is fairly easy to write a conditional statement in excel to say if points a, b, and c are above a ucl then do something, however this algorithm will detect shapes.
Let?s say a variable measured over time begins to form an s pattern with high and low points slowly expanding over time above or below a control limit, it will detect it. What if this pattern can be linked to a particular process failure, and be detected ahead of time? It?s also adaptive and begin to learn what patterns show up the most over time.
 
Thread starter Similar threads Forum Replies Date
B Control chart and sample time Statistical Analysis Tools, Techniques and SPC 1
J Control chart for huge sample size Statistical Analysis Tools, Techniques and SPC 9
M What is "setup control chart"? Statistical Analysis Tools, Techniques and SPC 2
A Redesigning our process flow chart, PFMEA and Control Plan Process Maps, Process Mapping and Turtle Diagrams 4
D Control chart applicable? Percentage of compliance with a standard Statistical Analysis Tools, Techniques and SPC 2
D Link between FMEA, flow chart and control plan FMEA and Control Plans 10
B How to do a control chart - Machining product that requires flatness control Capability, Accuracy and Stability - Processes, Machines, etc. 1
S Understanding control chart and measurement capability Statistical Analysis Tools, Techniques and SPC 2
F Appropriate Control Chart Statistical Analysis Tools, Techniques and SPC 5
S used excel formula calculated the ARL's with Rule1&Rule2 for Shewhart control chart Statistical Analysis Tools, Techniques and SPC 0
H How to define Root Cause when some points are out of control chart Statistical Analysis Tools, Techniques and SPC 6
L The ARL for an X bar Control Chart (n = 5) Statistical Analysis Tools, Techniques and SPC 5
L P-Chart Control Limit Calculation help Statistical Analysis Tools, Techniques and SPC 1
L A Complete Control Chart Decision Tree Statistical Analysis Tools, Techniques and SPC 5
S Variation Study on Mined Material - What do you call it (not a control chart) Statistical Analysis Tools, Techniques and SPC 7
G I-Chart and X bar Chart Control limits Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
S Regression Control Chart - Process Capability Statistical Analysis Tools, Techniques and SPC 18
R Control Chart Constants and Confidence Interval Statistical Analysis Tools, Techniques and SPC 7
P Specification and Tolerance in Stability Control Chart Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 9
I What is an "X-Rs" Control Chart? Statistical Analysis Tools, Techniques and SPC 4
I What is an Ideal Control Chart for Hospital Surgery Infections? FMEA and Control Plans 2
M Shewhart Control Chart for SPC In Excel - Explain the yellow and red marked column Statistical Analysis Tools, Techniques and SPC 2
K Advice on Calculating Control Chart Control Limits Statistical Analysis Tools, Techniques and SPC 13
J Statistical Significance and SPC Control Chart Reports Statistical Analysis Tools, Techniques and SPC 9
P SPC Data Collection and Control Chart Type question Statistical Analysis Tools, Techniques and SPC 4
R XBar & R Chart Spreadsheet to apply a Control Process Statistical Analysis Tools, Techniques and SPC 1
Chennaiite Control Chart for Non-Manufacturing Process Indicators - Is it worth? Statistical Analysis Tools, Techniques and SPC 1
O Is it an Assignable Cause only if the Control Chart says so? Statistical Analysis Tools, Techniques and SPC 16
C Control Chart Roadmap Template Document Control Systems, Procedures, Forms and Templates 0
T Shewhart Control Chart - ISO/TS 13530:2009(E), Page 22. General Measurement Device and Calibration Topics 3
M MSA (Measurement System Analysis) - Do we have control of all states in the chart? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 5
H Control Chart applications in Cement Industries Statistical Analysis Tools, Techniques and SPC 2
T Implementing SPC - Control Chart for Individual Measurements Statistical Analysis Tools, Techniques and SPC 9
R "Control" as used in 4.1 c) - Process Flow Charts (Process Sequence Chart) ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 12
I Control Chart for Mortality Rate on Broiler Farms Statistical Analysis Tools, Techniques and SPC 4
G Control Chart Selection for Crimping Operations for RJ 45 Plugs Statistical Analysis Tools, Techniques and SPC 5
K When to create a new Control Chart? Quick question Statistical Analysis Tools, Techniques and SPC 4
T Control Chart - Salt Spray Test Hours - Powder Coated Parts Statistical Analysis Tools, Techniques and SPC 3
S Calculation of Upper and Lower Control Limits for Control Chart? Statistical Analysis Tools, Techniques and SPC 7
R Control Chart Metrics/KPI - Measuring Effectiveness of Control Charting System Statistical Analysis Tools, Techniques and SPC 4
L Measurement Uncertainty using Control Chart Measurement Uncertainty (MU) 2
R Calculation Mean for Control Chart -X Double Bar Statistical Analysis Tools, Techniques and SPC 13
J What Control Chart should be used for Microbial Limit (NMT 100 cfu/m3) Statistical Analysis Tools, Techniques and SPC 12
B Color Individual Points on a Control Chart? Using Minitab Software 7
A Organization Chart Control and Quality Manual Integration ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 15
S Pre-Control Chart for Single Side Tolerance Statistical Analysis Tools, Techniques and SPC 1
T Control Chart to use when Sample Size is Constant Statistical Analysis Tools, Techniques and SPC 4
C Process Control Chart - Capable, but not stable question Capability, Accuracy and Stability - Processes, Machines, etc. 5
N Variable Control Limits Calculation - P Chart Statistical Analysis Tools, Techniques and SPC 8
J Please explain what formula is correct for "Mean and Range Control Chart" Statistical Analysis Tools, Techniques and SPC 1
Similar threads


















































Top Bottom