Control Charts
Limits computed FROM THE PROCESS, never from the specification — a process comfortably inside a wide tolerance can be wildly out of control and nobody would see it.
Where to find it
- Module: Manufacturing
- Group: Control
- Section: Quality Planning
- Screen: Control Charts
Address in the console: /mfg/control-charts
List · 14 columns · 15 fields on its form · 2 of them required · 2 actions
What the list shows
These are the columns of the list, in the order they are drawn. Any of them can be sorted on, filtered on, hidden, or exported.
| Column | Kind | Field name |
|---|---|---|
| Chart | Code | chart_no |
| Name | Text | name |
| Item | Code | item_no |
| Characteristic | Text | characteristic |
| Type | Status | chart_type |
| n | Number | subgroup_size |
| Centre | Number | center_line |
| LCL | Number | lcl |
| UCL | Number | ucl |
| Cp | Number | cp |
| Cpk | Number | cpk |
| Subgroups | Number | subgroups |
| Excursions | Number | out_of_control |
| Status | Status | status |
The form
What is asked for when a record is created here. Required fields are marked; a choice drawn from a configuration list is one an administrator can extend without a release.
| Field | Type | Choices | Notes |
|---|---|---|---|
| Name required | Text | ||
| Item | Choice | Looked up from existing records | |
| Characteristic required | Text | ||
| From an inspection plan | Choice | Looked up from existing records | |
| Work center | Choice | Looked up from existing records | |
| Machine | Choice | Looked up from existing records | |
| Chart type | Choice | xbar_r, xbar_s, individuals, moving_range, p, np, c, u, ewma, cusum | |
| Unit | Text | ||
| Subgroup size | Number | ||
| Specification minimum | Number | ||
| Specification maximum | Number | ||
| Target | Number | ||
| Baseline from | Date | ||
| Baseline to | Date | ||
| Status | Choice | active, draft, baseline, out_of_control, suspended, retired |
What you can do here
Set limits from the process primary
Compute control limits and capability
Asks for: Baseline from Baseline to
Record a subgroup
Record readings
Asks for: Chart* Readings (comma separated)* Lot Production order Shift Notes
* required
The rules that apply here
Everything on this screen obeys the platform rules rather than rules of its own. The ones worth knowing before you use it:
- Narrowing a list — search, conditions, sort, totals, export and saved views.
- What may be changed — the five grounds a record may not be edited on.
- Companies and business units — what the switcher above this list is doing to it.
- Creating a record — required fields, where choices come from, and how the number is allocated.
- Importing a spreadsheet — this screen accepts one, and it runs through the same rules as typing.