1. are all tenders, and the owner selects suitable consulting service providers, engineering contractors and equipment and materials suppliers through tendering. Corresponding to the bidding direction, the owner can also choose bidding negotiation, inquiry, direct signing, etc. But the owner chose to bid this time.
2. But they all belong to engineering contracting projects.
discrepancy
Their bidding scope is different. Engineering contracting projects include many contents, such as owner consultation (mainly providing consulting services such as technical scheme, design, process supervision, supervision and management consultant), engineering design, engineering procurement, engineering construction, engineering supervision, engineering operation, etc.
These contents belong to different stages and different work scopes of engineering contracting projects.
The owner needs a consultant, a contractor and some suppliers. Therefore, it can be judged that the owner should be responsible for the design and procurement, and the contractor only undertakes the construction, installation and commissioning. It belongs to the DB mode (design-build) in engineering contracting projects.