Hello,

the problem description states that split deliveries are not allowed. Yet, I could not find any information for installations. From the solution format one could derive that split installations aren't possible as well.

The problem description also states that "[...] each machine must be installed by a technician at
the customer location." and that a penalty is incurred for each idle day. Considering a request with multiple machines of one kind, I'd interpret the above quoted line as follows: installing a request with M machines of kind K consumes M installations and a single idle day would incur M times the penalty of K. This interpretation would render the given example instance infeasible as of requests (4) and (7).

Could you clarify whether installations and penalties are per machine or per request respectively.

Kind regards and thanks in advance
bg