ThingWorx Analytics Training: Module 9 Part 3
- December 23, 2022
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This video concludes Module 9: Anomaly Detection of the ThingWorx Analytics Training videos. It gives an overview of the "Statistical Process Control (SPC) Accelerator"
This video doesn't contain a required hands-on exercise. If you are interested in the accelerator, feel free to explore the accelerator by following along with this video.
A team at PTC built the accelerator to expedite the process of building an SPC application inside ThingWorx. This accelerator is not a fully-developed or supported PTC product - it is a set of ThingWorx entities for the user to modify and employ as needed. If interested, download the attached "Statistical Process Control Documentation_v6.5.pdf" and "SPC 6.5 Import Package.zip". NOTE: It is recommended to import into a sandbox or non-production environment running ThingWorx 9.1.6 or later.
This video has chapters — open the chapter menu in the player to jump to any section.
Chapter Summaries
0:00 – Introduction: SPC Accelerator in ThingWorx & SPC Main Mashup
The SPC (Statistical Process Control) accelerator is introduced inside ThingWorx, with the SPC Main mashup shown as the primary entry point for monitoring asset properties.
0:10 – Problem Areas Screen: Group By Line/Asset/Property & Search
A tour of the Problem Areas screen, using the Group By dropdown to organize out-of-control rule violations by production line, asset, or individual property, demonstrated with the L100 line and PTC-DTS.SPC.Blower asset, plus a search field to filter properties such as suction.
2:40 – SPC Monitoring Screen: Overview & Filtering
Double-clicking a line opens the SPC monitoring page, which auto-populates filters for the selected production line, asset, and property and drives all of the accompanying charts and values.
3:30 – X-bar Chart: Samples, X-bar-bar & Sigma Lines
Explains the X-bar chart plotting the average of each consecutive sample, the X-bar-bar mean line, and the plus/minus one, two, and three sigma lines used to flag erratic behavior and out-of-control rule violations.
4:39 – R Chart, S Chart & IXMR Chart: Control Limits
Covers the R chart (sample max minus min) with its R-bar line and upper/lower control limits calculated from standard-practice constants, plus the selectable S chart (standard deviation) and IXMR moving-range chart options.
5:44 – Capability Histogram: Set Point, Design Specs & CP/CPK
Details the ten-bin capability histogram, its target normal distribution, the user-defined set point, three-sigma lines, and upper/lower design specs, and how tail placement affects the CP and CPK process capability values.
6:47 – Date/Time Picker & Chart Refresh (Manual + Auto)
Shows how the date/time picker sets the last plotted point and updates every chart, alongside the manual refresh button and the checkbox for automatic chart refreshing.
7:18 – Add Explanation: Assign Causes, Ramp Up & Exclude Points
Demonstrates the Add Explanation pop-up on the X-bar chart to assign a cause (like Ramp Up) to a start/end range of abnormal points, add comments, exclude points from SPC consideration, and apply the change.
8:32 – History Screen: Control Limits, PP/PPK & CSV Export
Uses the History screen's production line/asset/property tree to calculate and Save Limits for X-bar and standard deviation control limits and central line, review PP and PPK metrics, edit assigned causes, and export them to CSV.
10:20 – Asset Configuration: Adding Production Lines & Assets (L300)
Walks through Asset Configuration to create a new production line named L300 and attach a streaming asset (the compressor) using the Select Streaming Asset magic wand.
11:34 – SPC Property Configuration: Sample Size, Design Specs & Set Point
Configures the Suction Pressure Bar G property with parameters for sample size, X-bar points, capability points, lower and upper design specs, and set point, then saves it with Add or Update SPC Monitoring.
13:22 – Predefined Explanation Reasons & Verifying the L300 Config
Adds a predefined point-explanation reason reusable across the L300 line, then returns to the monitoring screen to confirm the new compressor / suction pressure property and the "not enough data to compute SPC metrics" message.
14:38 – Conclusion: Accelerator Benefits & Course Wrap-Up (Module 9)
Summarizes how the SPC accelerator reduces development effort to bring SPC functionality into ThingWorx, previews upcoming ThingWorx Analytics training modules, and closes out Module 9, Anomaly Detection.