Due to the high confidentiality requirements of the bidding work, the bidding management adopts the stand-alone version. After the bidder completes the bidding documents and quotation, it will be sealed and submitted together with the bidding documents with a USB flash drive, and the data will be imported into the system after the bid opening.
The bidding subsystem is divided into three parts: ① Pre-qualification; (2) Bid evaluation; (3) The bidding part.
The prequalification part includes prequalification information of prequalification applicants, prequalification standard cleaning and statistical review results.
The tender evaluation part is used by the tenderer, including the preparation of the tender bill of quantities, bid opening, tender clearing, bid evaluation, unit price analysis and unit price and quantity adjustment.
The bidding part is for the use of bidders, mainly including tender preparation, unit price entry, calculation and printing.
1. Module structure diagram
The main function module structure of the bidding management system is shown in Figure 2-5.
Figure 2-5 bidding management subsystem module structure
2. Business flow chart
(1) prequalification business process, as shown in figure 2-6.
Figure 2-6 Pre-qualification Business Process
(2) The business process of bidding and bid evaluation is shown in Figure 2-7.
Figure 2-7 Business Flow Chart of Bid Evaluation
(3) The business process of the bidding part is shown in Figure 2-8:
Figure 2-8 Business Flow Chart of Bidding Part
3. Functional description of bidding module
(1) prequalification.
According to the requirements of the prequalification bidding documents, the information required to be filled in by the bidder in the prequalification application documents shall be entered into the system in the prescribed format, and the prequalification documents shall be sent to the bidder together with the U disk of the prequalification filling system, which shall be filled in by the bidder according to the actual situation, as shown in Figure 2-9.
The prequalification applicant completes the prequalification application materials in the system, prints them from the system and binds them into a book. When submitting the prequalification application documents, the U disk attached with the prequalification filling system (the prequalification application materials have been filled out) shall be returned together.
According to the prequalification application materials provided by bidders in the U disk, the system will automatically judge whether the applicant meets the requirements of relevant standards according to mandatory standards, and automatically grade the scoring items according to the bid evaluation rules. After completion, you can get a list in ranking order, and list the bidders who do not meet the requirements of mandatory standards for the final confirmation of the bid clearing working group.
Figure 2-9 Pre-qualification declaration interface
The bid evaluation of the bid evaluation committee is conducted on the basis of clearing the bid by the working group, and the results and basis of bid evaluation are managed by computer, which puts an end to the phenomenon that the scoring basis is vague and random in the process of manual bid evaluation, and makes the prequalification results truly implement the principles of fairness, openness and justice.
In order to solve the phenomenon that bidders may be surrounded by bids due to their free choice of the bidding contract sections, all contract sections of this project are divided into different categories according to the requirements during prequalification, and applicants only purchase prequalification documents according to the application categories. For bidders who have passed the pre-qualification, the computer will randomly select the contract section before selling the bidding documents, and do a good job of confidentiality.
(2) Preparation of tender list.
When compiling the tender bill of quantities, the bill of quantities of each part will be entered into the system according to the construction design drawings, and the system will summarize and generate the tender bill of quantities according to the quantity of the bill of quantities of each part.
(3) Receiving and dispatching management.
After the list is compiled, it will be sent and received.
Quotation: according to the bidding bill of quantities and the bidders in each contract section, make the corresponding data disk (U disk or CD). These data include the bidder's bill of quantities quotation information, the bidder's user name and password, etc. When the tenderer sells the tender documents, it will sell the data disk (U disk or CD) to the bidder.
Close: After the bidder completes the quotation in the quotation system, it generates the quotation data disk (U disk or CD), and submits the data disk (U disk or CD) containing the quotation data to the tenderee when submitting the bidding documents. When opening bids on site, connect the data disk of bidder's quotation to the owner's computer, import the bidder's quotation into the owner's database, and summarize the bidder's bid quotation amount, which can be used for bid evaluation.
In order to strengthen the confidentiality of bidding data, the bill of quantities and quotation data in the data disk (U disk or CD) are encrypted. Even if people get the data, they will see the garbled code. Only by importing the data into the system and entering the user name and password of the bidder can the bidding data be obtained.
(4) Bidding quotation.
The quotation part is an independent subsystem, which is used by bidders together with the data disk provided by the owner. Bidders can also download relevant programs and data directly from the website, but they need the correct permissions and passwords.
The bidder inputs the unit price, and then generates a data disk for the owner to open the bid.
1) data loading
Bidders can download the quotation data list from the bidding website according to the user and password provided by the owner, or read in the data from the quotation, including the bidding quotation list, bidding quotation information and bidder's unit information.
2) Quotation
The bidder inputs the bid price according to the program settings, and provides convenient functions such as proportional price adjustment, filtering and printing, as shown in Figure 2- 10.
Figure 2- 10 List Quotation Interface
3) Summary
The bidder fills in the unit price in the quotation system, and the system automatically calculates the total price according to the quantities of the items listed in this article. After setting the proportion of tax and insurance, the system will automatically calculate the amount and generate the quotation summary table. As shown in Table 2- 1.
After the quotation is entered, the generated data will be stored in the disk, which will be used as one of the documents for bid opening.
The application of bidding software reduces the workload of bidders in the bidding process. The contents of the list and the number of items are locked by the system and cannot be changed by the bidder. They can only fill in the tender offer (unit price or total price) according to the items and contents listed in the bill of quantities. After the bidder fills in the unit price, the system automatically calculates the total price, and generates the bill of quantities summary table according to the prescribed format and calculation method.
(5) on-site bid opening.
Table 2- 1 Quotation Summary
Enter the bidder's written quotation on site, and compare it with the quotation read into the U disk by the system to judge whether it is consistent. The downward floating coefficient can be randomly extracted from the system site to generate the bid opening record table, and the bid evaluation benchmark price of each contract section can be calculated according to the provisions of the bidding documents. As shown in figure 2- 1 1 and figure 2- 12.
Figure 2- 1 1 Website Bid Opening Interface
Figure 2- 12 Bid Evaluation Benchmark Price of each Contract Section
(6) Bid evaluation.
During the construction of Jingying Expressway project, the pre-qualification and bidding process, bid clearing and bid evaluation of supervision units are all completed with the help of computer. The specific method is to establish an internal LAN in the bid evaluation stage, and import the pre-qualification documents and quotation list filled in by the bidder into the system. The summary table is generated by the system according to the table format of bid clearing and bid evaluation for the use of the bid clearing team. The materials after bid clearing are summarized according to the table format of bid evaluation and submitted to the bid evaluation committee for review.
Each bid evaluation expert has a computer to score independently. After the scoring is completed, the system will automatically calculate the comprehensive scores of bidders according to the prequalification documents, quotation and bid evaluation rules of each bidder, rank the quotation scores of each bidder in blocks, and print the list of bidders' scores in each contract section. For the bidding quotation that can't make substantial response to the bidding documents, the system will generate a unqualified list for the tenderer and the bid evaluation team to examine and approve.
System generated bid clearing and bid evaluation forms, such as table 2-2 to table 2-6.
Because the bidding quotation is automatically calculated and summarized by the system, the arithmetic correction in the process of clearing the bid and evaluating the bid is avoided.
The supervision quotation is based on the quotation of the bidding supervision unit in supervision bidding. At the same time, according to the supervision bid price, the supervision bid price is automatically calculated.
(7) Quote analysis and list adjustment.
Adjust the unit price and generate the contract bill of quantities after adjusting the quantity, including the display and printing of various styles.
Table 2-2 Summary of Compliance Inspection Results
1) unit price analysis: compare and analyze the quotations of bidders in each bid section, and automatically display unbalanced quotations after setting the proportion for reference of unit price adjustment.
2) Unit price adjustment: the unbalanced quotation is adjusted before the contract quantity is generated, and the unit price adjustment can be divided into two types: bid price adjustment and unified unit price adjustment.
Table 2-3 Summary of nonconformity inspection results
Table 2-4 Summary of Expert Comprehensive Scoring
Table 2-5 Ranking Table of Scores of Pre-qualification Applicants for Elite Project Construction Bidding
Table 2-6 Comparison Table of Unit Price of Bill of Quantities of the First Winning Candidate
3) Quantity adjustment: adjust the wrong quantity before the contract quantity is generated.
4) Generation of contract bill of quantities: the contract bill of quantities is generated after the adjustment of unit price and quantity, in which quantity, unit price and amount replace the quantity, unit price and amount in the original list, and are part of the contract documents during construction and cannot be changed.
2.2.3 Innovation of bidding management
Jingying Expressway Project Office used the bidding system to assist the bidding project for the first time in Jiangxi Province and even the whole country, and achieved good economic and social benefits.
(1) In the bidding system, the bill of quantities is in the form of itemized list, which is convenient for quantity verification, measurement and payment, engineering change and final accounts of the project. , which is beneficial to the management and control of project cost.
(2) Computer-aided bidding can reduce the workload of calculation and summary in the process of bidding, tender settlement and bid evaluation, avoid arithmetic correction in tender settlement, and facilitate unbalanced quotation analysis and unit price adjustment. Thus, the work efficiency is improved, the cost is reduced and the bidding period is shortened.
(3) The bidders of each contract section are randomly selected from the applicants who have passed the prequalification by computer, which can effectively avoid the situation of bidders' bidding, prevent and avoid black-box operation, and standardize the bidding market.
(4) In the process of bid evaluation and calibration, the computer can automatically review and grade the compliance according to the detailed rules of bid evaluation, which can reduce the interference of human factors, improve the transparency of bidding work, embody the principles of openness, fairness, justice and integrity in bidding work to the maximum extent, and reduce the breeding of bad phenomena, which has good social benefits.
(5) The introduction of computer management in bidding management will help to improve the professional quality and management level of managers and lay the foundation for the informationization and standardized management of highway engineering projects.