Subgroups
Every subgroup with its readings, its mean and range, and which control rules it broke. A point that breaks a rule while every part is in tolerance is the whole reason the chart exists.
Where to find it
- Module: Manufacturing
- Group: Control
- Section: Quality Planning
- Screen: Subgroups
Address in the console: /mfg/spc-samples
Read-only list · 13 columns
This list is read-only: its records are written by the work that produces them. A correction, where one is possible at all, is made where the record was created.
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 |
| # | Number | subgroup_no |
| Taken | Date and time | taken_at |
| Characteristic | Text | characteristic |
| Mean | Number | mean |
| Range | Number | range_value |
| LCL | Number | lcl |
| UCL | Number | ucl |
| Out of control | Text | is_out_of_control |
| Out of spec | Text | is_out_of_spec |
| Lot | Code | lot_no |
| Order | Code | order_no |
| By | Text | operator_name |
What can be corrected
The fields offered when an existing record is edited. Whether the button appears at all is decided per record — see What may be changed.
| Field | Type | Choices | Notes |
|---|---|---|---|
| Action taken | Long text | ||
| Notes | Long text |
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.