According to the contract type and pricing method, how many contracting methods are there?

Fixed lump sum contract refers to contracting the project at the agreed total price. It is characterized by defining the contract content, calculating the package price and guaranteeing it at one time on the basis of drawings and engineering specifications.

In the process of contract execution, unless the construction unit requests to change the original contract content, the contractor shall generally not request to change the package price. This method is relatively simple for the construction unit, so it is welcomed by the general construction unit.

For the contractor, if the design drawings and specifications are quite detailed, the cost can be estimated more accurately, the contract can be considered more comprehensively, and there is not too much risk. This is also a relatively simple contracting method.

If the drawings and specifications are not detailed enough, there are many unknown factors, or unexpected situations such as sudden price increase of materials and bad weather occur, the contractor shall bear the unexpected risks; Therefore, unforeseen expenses are often increased, which is not conducive to reducing costs and ultimately unfavorable to contractors. This contracting method is usually only suitable for small-scale and uncomplicated projects.

2. Quantity-based pricing contract

The bill of quantities valuation contract is based on the bill of quantities and the unit price table. Usually, the construction unit entrusts the design unit or professional estimator (cost engineer or surveyor) to put forward the bill of quantities, listing the partial quantities, such as digging several cubic meters, tamping several cubic meters, concrete several cubic meters, plastering several square meters on the wall, etc. , the contractor will fill in the unit price and then calculate the total cost. Because the engineering quantity is calculated uniformly, the contractor can get the total cost as long as he rechecks and fills in the appropriate unit price, with less risk; The contractor only needs to review whether the unit price is reasonable, which is convenient for both parties. At present, this contracting method is widely used in the world.

3. unit price contract

In the absence of detailed construction drawings, or although there are construction drawings, but some conditions of the project are not completely clear, it is impossible to calculate the engineering quantity more accurately, so as to avoid letting the construction unit or contractor take too much risks because of luck. Unit price contract is more suitable.

4. Cost plus compensation contract

The basic feature of this contracting method is to determine the total cost of the project according to the actual cost of the project (including labor costs, materials costs, construction machinery use fees, other direct costs, construction management fees and various independent costs, but excluding the total management fees and taxes payable of the contracting enterprise), plus the agreed total management fees and profits.

This contracting method is mainly suitable for cases where the project content is not clear before construction, such as emergency projects designed and constructed at the same time, or projects that need to be repaired after disasters such as earthquakes and wars.

5, according to the total investment or contract workload charge contract fees.

This contracting method is mainly suitable for feasibility study, survey and design, procurement and supply of materials and equipment. That is, the design fee is calculated according to a certain proportion of the estimated investment, the survey fee is calculated according to a certain proportion of the completed survey workload, and the procurement contract business fee is calculated according to a certain proportion of the price of materials and equipment. These should be clearly stipulated in the contract.

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