Act of Artifact Processing definition seems too restrictive for subclasses

[swartik]

The definition of Act of Artifact Processing is:

A Planned Act of performing a series of mechanical or chemical operations on something in order to change or preserve it.

For subclasses such as Act of Construction and Act of Manufacturing, I'm unclear what the something is that's changed or preserved.

• Act of Construction uses construction of an airport as an example. The land on which the airport is to be sited is changed; is that the "something"?
• Act of Manufacturing creates artifacts, possibly from raw materials. This doesn't necessarily change or preserve raw materials. The act can convert them into something else.

I think my issue may be the definition's use of singular: "something" and "it". Given the class's name, I would expect the something to be an artifact. Obviously it's not.

Here is a suggested revised definition:

A Planned Act of performing a series of mechanical or chemical operations, the output of which is new, changed, preserved, or destroyed artifacts.

("Destroyed" occurred to me because I recently worked on a project concerned in part with disassembling nuclear weapons.)