There are three Data Models :-
1) The first Model, shown on this page, is for the first Phase, which is Manufacturing the Equipment, but without including 'consumables'.
2) The second Model also shows the first Phase, but this time including consumables, such as Gas.
3) The third Model shows the second Phase, which is Construction using the Equipment.
The Business Rules have been drafted for review, and they define the conditions that the Model must comply with.
This makes the analysis easier to discuss and understand.
There is also a Glossary of Terms to define exact meanings of words in common use.
An Access Database is available on demand.