Advocating for verification, I get. Advocating for trust, I am completely mystified.
OK how about an example (a simple one!)
SITUATION:
An OEM requires a custom made (to OEM design) machined "widget."
The annual quantity is 100,000 pieces.
the target "price point" is $5.00 each (plus shipping)
a search for prospective suppliers produces 3 which claim to be able to meet quantity and price
STAGE ONE:
- Verify each prospective supplier has proper equipment and open capacity to deliver the widget
- Ask to see any samples of work incorporating features similar to widget (tapered threads? cross holes? smooth bores? blind holes? surface finish [either ISO N unit or Ra units in microns]? etc.
- Evaluate (Verify) apparent quality of samples to meet widget criteria.
- Order and pay for sample widgets (not necessarily PPAP - prototype could be OK) - primary purpose is to Verify finished sample against criteria of widget to assure supplier and OEM have same understanding
- If all three prospects are still in the running, make site visit to Verify production and inspection systems equipment, and personnel appear to meet the original criteria.
- Make a decision and place an order
STAGE TWO:
- Verify the order arrives on time and passes incoming inspection
- Monitor subsequent shipments and maintain communication with supplier to assure no surprise changes may disrupt OEM processes.
To
Monitor is a less intense and detailed process than
Verify, but depends on
trust established by an overview of the supplier that it is not running a dingy sweat shop, has good relations with its own suppliers and with other customers, and fulfills its part of the bargain by continuing to supply product as contracted in a due and timely manner. In other words, once the initial verification has been satisfactory, the OEM can
trust the supplier to the extent that incoming inspection is no longer the equivalent of a First Article Inspection, but a more relaxed inspection of critical characteristics only. Similarly, multiple site visits are not required to assure the work is actually being performed on premises
[not sublet secretly to another, shoddier supplier.] The OEM may
trust the supplier, BUT continual communication with supplier leaves open the possibility the OEM "may" drop by for another site visit expecting to see his widget in production.