The importance of a clearly defined user brief in GMP facility design
When developing a pharmaceutical manufacturing facility, the user brief provides the basis on which the design team interprets the intended activities and translates them into a physical facility. Ambiguity at this stage can have consequences for operational suitability, GMP compliance, project cost and the programme for bringing the facility into use.
A requirement for “GMP-compliant cleanrooms”, for example, does not provide sufficient information to establish the appropriate design. The products, manufacturing processes, scale of operation, extent of open handling, personnel requirements and intended licensing arrangements all need to be understood.
These considerations inform the required environmental conditions, segregation strategy, personnel and material flows, utility provision and arrangements for cleaning, maintenance and waste removal.
For aseptic operations, specifying the room classification is only one element. The brief also needs to establish the intended barrier technology, material preparation and transfer arrangements, anticipated interventions and the means by which equipment will be maintained or replaced. These requirements are interdependent; a change to one may materially affect the others.
Similar care is needed when describing future flexibility. An intention to accommodate expansion should be developed into defined scenarios, with consideration given to the additional equipment, capacity, utilities and operational controls required. Otherwise, space may be reserved without the supporting infrastructure needed to make it usable.
In my view, an effective brief should distinguish between agreed requirements, assumptions that remain to be verified and provisions intended for future use. Where an assumption could materially influence the design, responsibility for resolving it should be allocated and a decision required before the affected design element is approved.
The requirements should also be sufficiently specific to allow their fulfilment to be assessed. “Adequate storage” has limited value unless the materials, quantities, storage conditions and segregation requirements are understood.
Early input from operations, quality and engineering is therefore essential. Their combined review should establish whether the proposed facility can support routine manufacture, changeover, maintenance and foreseeable departures from normal operation.
As the project progresses, changes should be assessed against this agreed basis, including their implications for contamination control, qualification, cost and delivery.
The practical objective is to resolve significant uncertainties while they can still be addressed through design development. Once those uncertainties have been incorporated into the building and its services, their resolution becomes considerably more difficult and expensive.