Doing a job with insufficient resources makes it less productive, more time-consuming, and dangerous.
Sometimes, a job gets planned that way to “save money.” This is a management failure. Usually what happens, however, is there is an unforeseen issue.
Perhaps the customer promised to provide two helpers, but after you arrived said they had to be assigned elsewhere. Or, the job planner doesn’t understand you need someone to set up lights, take care of the generator, place shims, use leveling devices, measure distances, and do other work that can’t be done by those who are directly involved in moving the enclosures into their correct positions.
Skilled labor isn’t the only resource that may be undercut. Someone may have concluded that ambient light is fine; thus, the lights and generator you requested are unnecessary. He also figured that if you don’t have lights and a generator to deal with, the crew needs one less person.
If you encounter a resource deficiency, notify your supervisor immediately rather than try to compensate.