Picture this: your most experienced assembly technician is retiring in three months. He knows every fastening application by heart - which torque limits apply to which material, why Line 3 needs different parameters than Line 5, and how to spot a critical joint before the torque log has even been reviewed. That knowledge lives in his head. Nowhere else.
That is the real risk hiding behind the skilled labor shortage: not just fewer hands on the floor, but lost process knowledge.
The Silent Threat: Knowledge That Walks Out the Door
According to the Institute for Employment Research (IAB), approximately seven million fewer skilled workers will be available by 2035 as the Baby Boomer generation reaches retirement age. [1] Every month, around 80,000 people leave the German labor market due to retirement alone. [2]
For manufacturing operations, this means that every retirement takes more than a person out the door - it takes decades of process knowledge out of the plant. Knowledge management theory draws a distinction between explicit knowledge (documented work instructions, bills of materials, maintenance plans) and tacit knowledge - the kind experienced employees carry intuitively: the quirks of certain assemblies, proven tightening strategies, critical threshold values that never made it into any manual. [3]
As long as this tacit knowledge exists only in the minds of individual employees, the organization remains vulnerable. [4] In fastening assembly, that vulnerability is especially acute: incorrectly configured tools, ambiguous joint classifications, or missing documentation can lead directly to quality failures, recalls, or liability exposure.
The real risk isn't the empty workstation – it's the empty dataset. When torque parameters, limit values, and process workflows exist only in an employee's head, every personnel change becomes a quality risk.
What Tacit Knowledge Actually Looks Like in Fastening Assembly
In practice, tacit process knowledge in fastening assembly shows up on several levels:
Joint classification per VDI/VDE 2862: The VDI/VDE 2862 guideline classifies fastening applications into categories A (safety-critical), B (function-critical), and C (non-critical) - based on the risk of failure and the ability to detect faulty joints. [5] Which application falls into which category is a judgment every company must make individually. [6] Experienced technicians often make that call intuitively - new employees, without documentation, are starting from a blank page.
Tool parameters and limit values: The right torque, the right angle, the right tightening strategy for each fastening application - these are decisions that have typically been refined over years of practice. Without digital archiving, those hard-won insights are ephemeral.
Process sequences and tightening order: Especially in complex assemblies with multiple fastening points, the tightening sequence is decisive for the final clamp load. Experienced operators know this. New employees have to learn it - or it needs to be documented somewhere.
Material-specific characteristics: Different base materials, coatings, and fastener types require tailored parameters. This kind of detail is classic tacit knowledge that rarely makes it fully into work instructions.
Digital Fastening Processes: From Tribal Knowledge to System Logic
[7] guides operators safely through predefined workflows and significantly reduces onboarding time. The decisive step, however, is not digitization itself - it is the translation of tacit knowledge into explicit, reproducible system logic.
That is precisely where GWK's production tools and analysis systems come in.
OPERATOR®: Parameterized Knowledge Right at the Tool
The OPERATOR® production tool stores fastening programs with all relevant parameters directly on the device. Target torque values, angle limits, tightening strategies, and tolerance bands are defined once - by the experienced process owners who hold that knowledge - and are then available to every operator in a fully reproducible way.
The intuitive operator interface of the OPERATOR® guides each worker step by step through the process. New employees do not need years of fastening experience to achieve correct results: the knowledge is embedded in the tool, no longer locked in the expert's head alone.
Via WLAN data transfer, all fastening results are transmitted to the software in real time and archived without gaps. Every joint is fully traceable - regardless of which employee performed it.
For systems with PLC connectivity, the OPERATOR® EST01 is available: it communicates directly with the production line and enables full integration into existing Industry 4.0 infrastructures.
QUANTEC MCS®: Unlocking Process Knowledge Through Analysis
Before knowledge can be preserved, it has to be made visible. The QUANTEC MCS® analysis tool with reference-point-free angle measurement is the instrument for precisely analyzing fastening joints and placing process parameters on a solid data foundation.
In development and quality assurance environments, the QUANTEC MCS® delivers the measurement data from which optimal fastening parameters can be derived. What an experienced technician previously set based on intuition is now objectified and documented through measurement curves, torque-angle traces, and statistical evaluations.
The result: process knowledge that was previously tied to individuals is converted into measurable, archivable parameters.
QuanLab Pro® and EasyWin®: Archiving and Accessing Knowledge
The QuanLab Pro® and EasyWin® software solutions close the loop: all measurement data, fastening programs, limit values, and process parameters are stored centrally, versioned, and made available for analysis.
In concrete terms, this means:
- Parameterization documented: Which fastening programs were created, when, with which values - and why?
- Results archived: Every fastening operation is stored with a timestamp, tool ID, and operator ID.
- Trends visible: Process deviations become apparent before they turn into quality problems.
- Audit readiness guaranteed: In the event of a complaint or audit, all relevant data is immediately retrievable.
Joint Classification: Knowledge That Must Be Documented
One particularly critical area is joint classification. The VDI/VDE 2862 guideline requires manufacturing companies to assess every assembly application individually: is the fastened joint safety-critical (A), function-critical (B), or non-critical (C)? [8]
This classification is not a one-time task - it must be reviewed whenever products change, new materials are introduced, or operating conditions shift. And it must be documented: if the employee who performed the original classification leaves the company, the reasoning behind it must remain traceable.
| Klasse | Bezeichnung | Risiko bei Versagen | Anforderung an Dokumentation | Werkzeugeignung |
|---|---|---|---|---|
| A | Sicherheitskritisch | Personenschaden möglich | Vollständige Rückverfolgbarkeit jeder Verschraubung | Mess- und dokumentationsfähiges Werkzeug zwingend |
| B | Funktionskritisch | Funktionsausfall des Produkts | Stichprobenhafte oder vollständige Dokumentation | Werkzeug mit Ergebnisausgabe empfohlen |
| C | Unkritisch | Ärgernis, kein Sicherheits-/Funktionsrisiko | Prozessdefinition ausreichend | Einfaches Werkzeug zulässig |
The Q-CHECK® QS and audit tool enables fastening joints to be checked during ongoing production and process capability studies (PCS) to be conducted in accordance with VDI/VDE 2645-3. This ensures that classification is not only documented once, but continuously validated.
Process Independence as a Goal: What It Actually Means
Process-independent workflows do not mean employees are interchangeable. They mean that process knowledge is not tied to specific individuals - and therefore remains stable through personnel changes, absences, or shift rotations.
[7] delivers exactly that: it guides operators safely through predefined workflows and shortens onboarding time. New employees - even those without deep fastening expertise - can achieve correct results because the knowledge is built into the system.
For manufacturing operations, this translates into concrete advantages:
- Shorter onboarding times: New employees are guided by the tool, not by word of mouth.
- Consistent quality: Regardless of shift, operator, or day-to-day variation, the process delivers reproducible results.
- Audit readiness: All fastening results are fully documented and retrievable at any time.
- Reduced risk during personnel transitions: The knowledge stays in the system, even when the expert leaves.
Knowledge Transfer Starts Today - Not When the Expert Gives Notice
[9] emphasizes: rapid and precise knowledge transfer is essential to avoiding poor decisions and shortening onboarding periods. The right time to digitize fastening processes is not when the next retirement is on the horizon - it is now, while the knowledge holders are still on the floor.
In practice, that means:
- Inventory: Which fastening applications are classified? Which parameters are documented? Where is critical knowledge still living in someone's head?
- Analysis with QUANTEC MCS®: Capture existing fastening joints metrologically and put parameters on a data-driven foundation.
- Parameterization with OPERATOR®: Define fastening programs, store them in the tool, and archive them via EasyWin®.
- Validation with Q-CHECK®: Verify process capability and substantiate classifications.
- Continuous archiving: Store all results without gaps - as the basis for audits, improvements, and the next personnel transition.
Companies that transform the tacit knowledge of their workforce into digital logic gain a significant competitive advantage - they become more agile, less dependent on key individuals, and more attractive to new talent. [4]
Demographic change cannot be stopped. But its impact on the quality of your fastening assembly is manageable - if you put the right tools in place today.
Accuracy by GWK - for fastening processes that still perform tomorrow.
