cost subclasses have to be rescructured according to #1875

[stap-m]

Description of the issue

We decided to make cost a process attribute, see oeo-dev 86 and #1902
Cost is a process attribute that describes the amount of money needed to buy, make, or do a thing.

Now we have to restructure its subclasses:

• which are process attributes?
• what are the corresponding quantity values?
• check existing axioms!

Ideas of solution

If you already have ideas for the solution describe them here

Workflow checklist

• I discussed the issue with someone else than me before working on a solution
• I already read the latest version of the workflow for this repository
• The goal of this ontology is clear to me

I am aware that

• every entry in the ontology should have a definition
• classes should arise from concepts rather than from words

[madbkr]

I took a look at these classes. If I am not doing this wrong - which is possible - then none of them have unique axioms associated with them except social cost (and one of those is marked as obsolete).

From the reading I did I feel like those would be process attributes:
delivery cost
investment cost (and all it's subclasses)
variable cost (and all it's subclasses)
levelised cost of electricity

While these classes don't seem to fit process attribute for me:
fixed cost because by definition those should apply to several processes and therefore not existentially depend on it.
social cost of emission because this is linked to the emission value rather than a specific process.

[stap-m]

From the reading I did I feel like those would be process attributes:
delivery cost
investment cost (and all it's subclasses)
variable cost (and all it's subclasses)
levelised cost of electricity

I agree. Maybe we can find some meaningful axioms anyway.

While these classes don't seem to fit process attribute for me:
fixed cost because by definition those should apply to several processes and therefore not existentially depend on it.
social cost of emission because this is linked to the emission value rather than a specific process.

fixed cost: There are no fixed costs without an operation or maintencance process. Therefore, I see an existential dependency of processes here, too.

social cost of emission: this looks like an inconsitency in the def and axioms. I'll take a closer look.