Is a Qualified Person Running That Process? Operator Skill Matrix, Certification, and MES Interlock Design

The Plant Where Defects Rise When the Veteran Is Away

Some processes show a higher defect rate only on days a particular operator is off. Trace the cause and it often has little to do with the machine or the material. It comes down to who was standing at the station.

Paper skill charts versus actual assignments: The chart on the wall is updated twice a year, while assignments change every morning at the supervisor's discretion. The two never meet.

Recurring findings on competence evidence: IATF 16949 requires evidence of competence (7.2) and on-the-job training. When an auditor asks, "Was the person who ran this lot qualified at the time?", the answer has to be pieced together by hand from training logs and daily production reports.

Single-person dependency: Only after a resignation, transfer, or shift change does it become clear that just one person could run that process.

Defining the Skill Matrix as Data

Skill items and level criteria

Avoid broad items such as "can weld." Define skills at the level of process, equipment, and part. A robotic welding cell and manual TIG welding are different items. A four-level scale is the most common choice.

Level 1: In training; works only under supervision

Level 2: Can work independently according to the standard

Level 3: Can respond to abnormalities and make quality judgments

Level 4: Can train and assess other operators

One record for the whole qualification

Training completion date, practical assessment result, approver, and expiry date belong in a single qualification record. If training lives in an HR spreadsheet and assessments sit in a quality binder, they do not add up to evidence.

Expiry and automatic downgrade

A qualification is not granted once and forgotten. For example, you might recertify special processes every 12 months and general processes every 24 months, with a reminder 30 days before expiry. Add a rule that downgrades the level by one step after six months without performing the process. Because the MES already holds production records, the last-performed date is calculated without anyone entering it.

MES Interlock: Unqualified Work Does Not Start

Checking at job start

When an operator badges in or scans a barcode, the MES compares the work order's process, equipment, and part against the qualification record. Level 2 or higher may start. A Level 1 operator can proceed only when a Level 4 trainer also signs in.

Blocking versus warning

Block everything and the line stops. Apply a hard interlock to special processes such as welding and heat treatment, whose results cannot be fully verified by later inspection, and to inspection operations. Use a soft interlock, a warning followed by permission to proceed, for general assembly and packaging.

Exception approval and phased rollout

There will be days when an unqualified operator has to fill a gap. Let a manager enter a reason and approve the job, but make sure the approver, the reason, and the affected lot are recorded. The number of exceptions is itself a signal of where training is needed.

To limit resistance on the floor, we recommend logging without blocking for roughly the first month, then showing warnings, and only then switching to blocking. Most master-data errors surface during the logging stage.

Using the Data for Staffing and Development

Finding substitutes: When someone is absent, query the people who hold Level 2 or higher for that process and are present that day, and validate qualification coverage when building the shift roster.

Risk map: Counting qualified operators per process exposes single-person dependencies. If 6 of 40 processes have only one qualified operator, 15% of your processes could stop when one person leaves.

Training priorities: Set a target such as "at least two people at Level 3 or higher per process," and the shortfall becomes the training plan. Cross-training decisions rest on gap data, not on intuition.

Decision Criteria and the POLYGLOTSOFT Approach

Start by deciding who owns each piece of master data. A typical arrangement makes the HR system the owner of employee and employment status, the attendance system the owner of who is present, and the MES the owner of process qualifications and performance history. Once the same data is edited in two places, the interlock quickly loses credibility.

Starting small is the safer path. Run qualification records and interlocks on two or three special processes first, then extend to inspection, then to general processes.

POLYGLOTSOFT designs the skill matrix and qualification interlock as part of its MES solution. If you already run an MES, our subscription development service can add a qualification module to the system you have. If you would like to answer "Was a qualified person running that process?" with data before your next audit, please get in touch with POLYGLOTSOFT.