Now almost all bidding projects are undertaken at low prices. In order to ensure the normal low-cost profit of the enterprise, as a project manager, we must first be clear in thought and unify the ideological goals of all subordinate managers in the process of realizing the target benefit. We should pay attention to listen to everyone's opinions carefully, eliminate the dross and summarize all opinions and suggestions, add our own opinions from the perspective of decision makers, and organize a feasible plan with an overriding goal. Express clearly, completely, concisely, correctly and confidently to all implementers. To achieve economic benefits, we must open up new sources and reduce expenditure. Without unified thinking, there will be no concerted action, and there will be no result of achieving the goal.

1. Flaws in Perfect Design A perfect design is always composed in the mind, so there can be no perfect design, only a complete design. When the builder finds that the design is in harmony with the site, he will put forward the loopholes in the design and even change the unreasonable design scheme, so that the new scheme will become a fully balanced unity with appropriate functions, advanced technology and reasonable economy. Changing design is one of the open source methods. When winning the bid, the old scheme may have no profit or little profit, but the new scheme can achieve normal profit when modifying the functions and materials to achieve the effect required by the construction unit. However, this method requires the contractor to have a certain design ability, and the designer should have the ability to combine technology and economy organically, control and constrain the new design from the project cost, deeply study and discuss the possibility of saving, and modify the effect design, technical design and construction drawing design. Even if the design does not need to be changed, there is still source code to open. For example, the original design missed items, unclear ending, etc., all have the opportunity to charge the construction unit due fees in various forms.

2. Mastering the budget cost As a project manager, if you want to improve the cost, you must have a clear understanding of the total cost of the project you operate, make clear the key points of the cost, and create open source methods at the key points. As gross profit cost, it is nothing more than material cost and labor cost. The quantities in the bidding project are all budgeted quantities, and the actual quantities will change. If you have a clear understanding of the quantity of material cost and labor cost, you can charge the builder for the increased quantity of work.

3. Open source construction management 1) Be familiar with the contents of various visas.

For example, the claim for shutdown should include temporary facilities, maintenance, idleness of construction personnel, salary of management personnel, site expenses during shutdown, turnover losses caused by shutdown, shutdown cleaning expenses, lump sum expenses increased by shutdown, quality assurance expenses, adjustment expenses of artificial materials and other unforeseen expenses 12. According to the length of downtime, the factors of market changes and the management expenses of the enterprise itself, the corresponding claims are put forward.

2) Complete data collection.

Including contracts, construction drawings, drawings, specification requirements, visas of both parties, meeting minutes, construction logs, payment records, photos, correspondence documents, etc.

3) Perfection of visa content.

Including the rationality, legality and authenticity of the visa, the method on which the engineering quantity is calculated, the detailed list of the results, the signature or seal of the relevant legal person, etc.

4. The open source project manager is the first person to manage the site. He must take part in the settlement work, collect and sort out the relevant settlement data, be familiar with the explanation, explanation and supplement of the quota, improve the settlement book according to the actual situation of the engineering degree, and compile the actual subtitle of labor, machinery and material loss to ensure that the settlement does not miss items. Especially in the case of insufficient quota, we can determine the use and consumption of materials, analyze the unit price, reasonably price, convince the construction unit and increase the income for the enterprise according to our own experience, cost and actual construction situation.

5. Good construction organization design and construction management is a great means to open the source of project management. Here, we will focus on how to reduce the rework rate in construction organization design and construction management. The project manager should cultivate strong foresight and be good at listening to and summarizing other people's construction experience. Sometimes mistakes are inevitable, but mistakes can be divided into recoverable and irreversible. Attention should be paid to the treatment of recoverable mistakes, and several points should be made on the premise of not affecting the enthusiasm of employees; However, irretrievable mistakes should be braked resolutely, ordered to be corrected, the rework rate should be reduced to the lowest point, and strict control and management should be carried out to people, so that the project can be qualified as soon as possible.

Control of labor cost. In the process of subcontracting, low-cost contracting teams are selected on the premise of ensuring quality and progress, and working hours are recorded in the construction project, so as to accumulate necessary experience for the project manager to verify the subcontracting unit price. And clearly know the contractor's profits, put forward a powerful bargaining chip in the subcontract settlement, and ensure that the contractor has only reasonable profits without profiteering on the premise of ensuring the quality and quantity of the project.

Control of material cost. Shop around to find big materials and try to realize futures trading on the premise of clear cost. Strengthen the turnover of turnover materials and funds. Reasonable arrangement of material procurement, reduce the miscellaneous expenses of mining, transportation and insurance. Improve the procurement system and use materials reasonably. For the use of sporadic materials, strengthen management education and establish a reward and punishment system. By means of encouragement, punishment, supervision, competition and more information, buyers can reach the management realm of greed, fear and powerlessness.

Shortening of construction period. Time limit for a project is a double-edged sword to reduce the project cost. The tight construction period doubles the cost (increasing labor, reducing the amount of turnover materials, increasing mechanical equipment, increasing material prices, etc.). However, due to the tight construction period, the management costs (personnel salary, financial expenses, management expenses and capital turnover) of the enterprise will decrease. How to achieve the throttling effect on this double-edged sword requires the project manager to make rational use of resources, fully mobilize the enthusiasm of lower-level managers, reasonably arrange the construction sequence and pay more attention to on-site management.

Reduce unforeseen expenses. In the process of construction, there are many unforeseeable situations. For example, work-related injuries, fines imposed by the municipal supervisor, inspection of temporary residence permits, and various claims. The project manager should strengthen management and education to stop such losses in time.

The rise and fall of an enterprise is divided into three parts: technology and management. The project manager is the center of manager and management. It is necessary to achieve the goal of increasing income and reducing expenditure through top management, and realize the double harvest of social and economic benefits of enterprises.