Principles and basis for the division between owner-supplied and contractor-supplied items
Principles for dividing owner-supplied and contractor-supplied materials: equipment with high value and major impact is preferentially owner-supplied (chillers, boilers, transformers, elevators, etc.); equipment that is technically complex and requires customized procurement is suitable for owner supply; materials with large price fluctuations (copper pipes, cables) may be owner-supplied according to market conditions; categories that benefit from economies of scale in procurement are centrally purchased through owner supply; products that must be unified with the group's brand standards are owner-supplied according to the centralized procurement brand. Applicable scenarios for contractor-supplied materials: highly versatile materials and equipment are more flexibly procured by the contractor; auxiliary materials that need to coordinate with the construction schedule are contractor-supplied to reduce intermediate steps; materials with low value and little impact on quality are procured by the contractor to reduce management burden.
Procurement management and risk control of owner-supplied materials
Owner-supplied material procurement management involves bidding, contracts, payment, arrival inspection, and warranty. Bidding should be initiated in advance, and the procurement plan should be completed before construction bidding. Owner-supplied material contracts should clearly specify the delivery location, unloading responsibilities, and the handover point of custody responsibility. Risk control: supply time risk (set liquidated damages clauses for delayed delivery and establish an arrival warning mechanism); quality risk (set up FAT testing and arrival inspection procedures); price risk (lock prices or set price adjustment mechanisms); interface risk (clarify the interface between owner-supplied and contractor-supplied materials).
Brand control and quality management of contractor-supplied materials
Brand control measures for contractor-supplied materials: establish a list of qualified brands (recommended brands, optional brands, restricted brands). Contractors should choose from recommended or optional brands. Contractor-supplied materials shall be submitted for approval before procurement; the contractor submits a material submission form with brand certificates and test reports for review and approval by the supervisor and owner. Quality management implements an on-site acceptance system; the supervisor reviews brand, specifications, quantity, and quality certification documents and conducts necessary on-site sampling. Materials failing sampling are immediately removed from site. Fire protection products and pressure piping, etc., are subject to 100% witnessed sampling and testing.
Interface coordination and interface management between owner-supplied and contractor-supplied items
The core of interface management for the connection between owner-supplied and contractor-supplied materials is to clarify interface responsibilities and coordination requirements in the contract. Installation of owner-supplied equipment is the responsibility of the contractor-supplied contractor, but installation guidance is provided by the owner-supplied supplier. During commissioning, the owner-supplied supplier provides on-site technical support, and the contractor-supplied contractor is responsible for piping connections and electrical wiring. Final acceptance is attended jointly by all three parties. Random spare parts are received by the contractor at completion acceptance and included in the handover list. An interface table for owner-supplied and contractor-supplied equipment and materials should be attached to the contract to clarify the responsibility division for each item of equipment.