There is an important point here as to sequence and timing which is not entirely clear to me from the question. I think the sequence is 1) PM instructs use of particular material, 2) Contractor adjusts to order that material, 3) Contactor submits a quotation, 4) delay is incurred, 5) PM suggests increasing resource.
If that sequence is correct then I think we really have a CE (change in materials) and a request to accelerate. If the PM suggestion of increasing resources were earlier in the sequence I would agree with Dave but if it comes late then it is more complicated.
If that sequence is correct then I think we really have a CE (change in materials) and a request to accelerate. If the PM suggestion of increasing resources were earlier in the sequence I would agree with Dave but if it comes late then it is more complicated.