A sterile injectable facility's Grade B suite had to hold its pressure cascade through every airlock under GMP Annex 1, with the plant room footprint already fixed at 310 m² by the building design.
Room-by-room air change and load calculation with the margin stated explicitly per grade
Pressure cascade modelled as a network rather than room by room, exposing two airlocks that would have collapsed under simultaneous door opening
AHU selection constrained to the fixed plant room footprint with maintenance access preserved
Design qualification documentation written to survive audit, with every criterion traceable to the URS
Two commissioning site visits to support the C&Q team through the cascade verification
A 7-storey 1970s office block had to stay occupied through a seismic retrofit. The original drawings were incomplete, concrete strength varied by 40% between cores, and the client could not vacate more than one floor at a time.
A die-cast aluminium pump housing was 22% over its mass target but the tool was already cut. A new tool would have cost the programme five months.
A 42 MWp plant's provisional connection offer carried a reactive capability condition the originally specified inverters could not meet across the full voltage range. The issue surfaced three weeks before financial close.
