The three fields run to different depths. We say how deep, and what the evidence rests on.
Leasing and finance
Core competenceEvidenceAround ten companies run the systems we maintain under contract, with portfolios from a thousand to more than 80,000 contracts each.
A portfolio has to hold up across its whole term, from calculation at the point of sale through posting and accruals to early termination. What actually happens in such systems is in no requirements list; you learn it over the years you spend with those transactions in production. vertragWerk, our own web-based solution, grew out of that work.
Where it ends: The evidence comes mostly from systems we maintain rather than built, and our own product is in beta and looking for pilot customers.
Logistics and delivery
Live projectsEvidenceDispatchers plan deliveries to more than 4,000 sales points through a back office we built.
The chain runs from route planning under the operator own constraints, through the driver capturing goods by scan on iOS and Android, to invoicing the end customer. The same work previously ran on portable MS-DOS mini PCs, with data arriving on USB sticks and receipts from a printer in the van. Payment routes, accounting handover and electronic invoice exchange hang off the same chain.
Where it ends: What we can show is one chain running end to end, not a cross-section of several delivery models.
Plant engineering
Special caseEvidenceThe program calculates dished heads to DIN 28011 and DIN 28105 and follows VDI/VDE 3519 sheet 1 for fill volume and dip tables, naming the source with every result.
It calculates vessels in facilities for storing, filling and transferring. Besides total volume it gives content by fill height and allows extra reference points in the height ranges where a few centimetres make a large difference in volume. The probe length for the overfill prevention follows from the same figures.
Where it ends: The result is a calculation aid for the planning engineer and not an inspection finding, the assessment under water law stays with the expert, and outside this one calculation task we have nothing to show in plant engineering.