Before acting on “What shaft size is required”, confirm the controlling value and basis, datum where relevant, operating or construction condition, tolerance and margin, actual site information, adjoining interfaces and source document.

Before acting on “What pit depth do we need”, confirm the controlling value and basis, datum where relevant, operating or construction condition, tolerance and margin, actual site information, adjoining interfaces and source document.

Before acting on “What headroom is required”, confirm the controlling value and basis, datum where relevant, operating or construction condition, tolerance and margin, actual site information, adjoining interfaces and source document.

Before acting on “Can the lift door move”, confirm the current design basis and reason for the change, test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, coordinate architecture and lobbies, structure and shafts, electrical and communications, fire and security, and identify work already released, approvals, testing and the smallest safe hold point.

For “What structural loads apply”, provide the exact location and current references, state the governing criterion and decision required, identify affected interfaces and irreversible work, give a genuine need date and record the answer in controlled project information.

Before acting on “What power supply is required”, confirm the controlling value and basis, datum where relevant, operating or construction condition, tolerance and margin, actual site information, adjoining interfaces and source document.

Before acting on “Can the lift type change”, confirm the current design basis and reason for the change, test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, coordinate architecture and lobbies, structure and shafts, electrical and communications, fire and security, and identify work already released, approvals, testing and the smallest safe hold point.

For “What builder's works are required”, provide the exact location and current references, state the governing criterion and decision required, identify affected interfaces and irreversible work, give a genuine need date and record the answer in controlled project information.

To resolve “When must the shaft be ready”, mark the exact location and geometry, confirm traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, access and tolerances, coordinate the condition with architecture and lobbies, structure and shafts, electrical and communications, fire and security, and close the installation and evidence requirements before release.

For “What installation access is needed”, provide the exact location and current references, state the governing criterion and decision required, identify affected interfaces and irreversible work, give a genuine need date and record the answer in controlled project information.

Before acting on “Can the pit detail change”, confirm the current design basis and reason for the change, test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, coordinate architecture and lobbies, structure and shafts, electrical and communications, fire and security, and identify work already released, approvals, testing and the smallest safe hold point.

To resolve “How does fire recall work”, map the operating modes, inputs, outputs, ownership and failure states across architecture and lobbies, structure and shafts, electrical and communications, fire and security; then define the coordinated drawing, programming and integrated test that closes the interface.

To answer “Can the landing level tolerance be accepted”, identify the governing requirement and authorised decision maker, then close the supporting design, specialist, evidence, inspection and contractual gates rather than relying on one review.

For “What communications are required”, provide the exact location and current references, state the governing criterion and decision required, identify affected interfaces and irreversible work, give a genuine need date and record the answer in controlled project information.

For “Can we stage lift handover”, confirm the temporary and permanent conditions, prerequisites, sequence, access, protection, hold points and evidence before the next activity removes options.

For “What temporary protection is required”, confirm the temporary and permanent conditions, prerequisites, sequence, access, protection, hold points and evidence before the next activity removes options.

Before accepting “Can the supplier use an alternative product”, compare traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, evidence, compatibility, warranty, lead time, maintainability, interfaces and every required approval.

To close “What testing is required”, define the acceptance criterion, evidence, sample or test condition, witness point, responsible signatory, defect response and the release or handover gate.

To close “What is blocking commissioning”, define the acceptance criterion, evidence, sample or test condition, witness point, responsible signatory, defect response and the release or handover gate.

To close “What is the final lift handover requirement”, identify the controlling document and responsible owner, list every design, client, statutory, contractual and evidence gate still open, then issue one position that construction and handover can rely on.

A seemingly simple request can depend on several disciplines, the client, a certifier or a specialist trade.

They can provide a view but cannot commit the client, company, regulator or another designer.

Consultants test positions privately because the interface is shared or politically sensitive.

Trust can accelerate honest coordination; history and alliances can also distort the current decision.

The apparent delay may be an unresolved design-leadership issue rather than simple inaction.

A consultant may qualify a response instead of openly contradicting a peer.

No appointment clearly owns the missing design, coordination or evidence task.

Acceptance may extend beyond available information, competence, authority or fee.

Earlier briefs, approvals and conversations may still shape the consultant response after the delivery model changes.

Commercial pressure cannot remove duties around competence, safety, compliance and records.

A genuine site need still requires adequate facts, checking and the right signatory.

The consultant may be waiting on survey, selections, another design, client direction or trade data.

Redesign, unpaid work or changed scope can appear as a technical delay.

The people producing information may not know assumptions held by project leaders.

A small design response can disrupt sequence, fabrication, access, rework and programme.

Shafts, lobbies, doors and finishes.

Shaft sizes, structural loads.

Additional cars drive shafts, pits, lobbies, structure, power, controls, maintenance and large area opportunity cost.

Survey dimensions, plumb, openings, embeds, beams, waterproofing, drainage, access, cleanliness and tolerances before handover.

A practical change may affect vertical transport consultant performance, approvals and connected design assumptions and obligations beyond the immediate trade.

Before agreeing to “Can we reduce the number of lifts”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

Before agreeing to “Can we reduce lift speed”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

Before agreeing to “Can we reduce car size”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

For “Can we use standard finishes”, group requirements by traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, location and interface; retain exceptions where the design basis genuinely differs.

For “Can we simplify controls”, remove components, geometry or labour only where traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, access, testing, maintainability and adjacent packages remain protected.

Before agreeing to “Can we reduce destination control features”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

Before agreeing to “Can we use machine-room-less lifts”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

For “Can we rationalise shaft sizes”, group requirements by traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, location and interface; retain exceptions where the design basis genuinely differs.

For “Can we simplify lobby interfaces”, remove components, geometry or labour only where traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, access, testing, maintainability and adjacent packages remain protected.

Before agreeing to “Can we reduce special access-control integration”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

For “Can we use standard door sizes”, group requirements by traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, location and interface; retain exceptions where the design basis genuinely differs.

Before agreeing to “Can we reduce lift monitoring features”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

Before agreeing to “Can we eliminate a service lift”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

For “Can we use local finishes”, quantify what is being removed and what must replace its function elsewhere in the design or operating strategy.

For “Can we simplify pit waterproofing requirements”, remove components, geometry or labour only where traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, access, testing, maintainability and adjacent packages remain protected.

Before agreeing to “Can we reduce standby power requirements where permitted”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

For “Can we accept supplier-standard details”, group requirements by traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, location and interface; retain exceptions where the design basis genuinely differs.

Before agreeing to “Can we reduce lift-car customisation”, confirm the original demand and margin, then test effects on traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, architecture and lobbies, structure and shafts, electrical and communications, fire and security, future flexibility and acceptance evidence.

For “Can we defer non-essential features”, quantify what is being removed and what must replace its function elsewhere in the design or operating strategy.

For “What lift specification change saves the most without hurting capacity”, test the proposal against traffic handling and capacity, ride and speed performance, shaft, pit and headroom geometry, power and emergency operation, interfaces with architecture and lobbies, structure and shafts, electrical and communications, fire and security, evidence and work already procured.