Ship design cost management and control method and system

Abstract

The invention discloses a ship design cost management and control method and a ship design cost management and control system. The ship design cost management and control method comprises the steps of performing initialization setting on the price of raw materials, the purchase cost, the manufacturing cost, the engineering target cost, ship design change classification and ship design change reasons. And based on the ship design change reason, designing a design change scheme and initiating a design change application. And performing influence analysis on the design change scheme based on the design change scheme and the design change application. And performing one-time feasibility judgment based on the influence analysis result. And after the primary feasibility judgment is passed, calculating the estimated cost generated by the design change, carrying out secondary feasibility judgment based on the estimated cost, and executing the current design change scheme after the secondary feasibility judgment is passed. According to the invention, full-process ship building cost management and control can be truly realized digitally, so that the purpose of reducing the ship building cost is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship design management, and in particular to a ship design cost control method and system. Background Art

[0002] The shipbuilding industry has the characteristics of "single-piece small batch production", "capital intensive", "technology intensive", "complex product manufacturing", "construction, design and modification at the same time", etc. The cost generation cycle is long, which increases the difficulty of cost control. Shipbuilding costs mainly include the cost of the design stage, the cost of the procurement link and the cost of the manufacturing link. In order to maximize profits, major shipbuilding companies have established a target cost management system that meets actual needs. However, due to the difficulty in solidifying the technical status, shipowners' ship inspections and on-site optimization have led to design changes. These design changes are not analyzed and controlled based on costs, namely raw material costs, procurement costs, and production costs, resulting in differences between actual construction costs and target costs, affecting corporate profits. Summary of the invention

[0003] In view of the above shortcomings of the prior art, an object of the present invention is to provide a ship design cost control method and system to control the costs generated by design changes and reduce shipbuilding costs.

[0004] In order to achieve the above-mentioned and other related purposes, the present invention provides a ship design cost control method, comprising:

[0005] S1: Initialize the price of raw materials, procurement cost, manufacturing cost, engineering target cost, ship design change classification and reasons for ship design change;

[0006] S2: Based on the reasons for the ship design change, design the design change plan and initiate a design change application;

[0007] S3: Based on the design change plan and design change application, conduct impact analysis on the design change plan;

[0008] S4: Conduct a feasibility assessment based on the impact analysis results;

[0009] S5: After a feasibility assessment is passed, the estimated cost of the design change is calculated;

[0010] S6: Make a secondary feasibility judgment based on the estimated cost.

[0011] Optionally, the step of performing an impact analysis on the design change plan based on the design change plan and the design change application includes:

[0012] Conduct impact analysis of upstream and downstream related factors on design change plans;

[0013] Determine whether the design change plan is feasible based on the results of the impact analysis.

[0014] Optionally, the step of making a feasibility judgment based on the impact analysis result includes:

[0015] When the result of a feasibility judgment is yes, execute step S5;

[0016] When the result of a feasibility judgment is no, the design change process is terminated.

[0017] Optionally, the step of calculating the estimated cost of the design change and performing a secondary feasibility determination based on the estimated cost includes:

[0018] Calculate the estimated cost of design changes based on impact analysis and initial settings;

[0019] The estimated cost is added to the cost of the unchanged part to form a dynamic construction cost;

[0020] Compare dynamic construction costs to target costs;

[0021] A secondary feasibility judgment is made based on the comparison results.

[0022] Optionally, the step of performing a secondary feasibility judgment based on the comparison result includes:

[0023] If the dynamic construction cost is greater than the target cost, the design change plan is redesigned.

[0024] Optionally, after the redesigning step of the design change plan, the following is further included:

[0025] Based on the redesigned design change plan, steps S2 to S6 are re-executed until a feasibility judgment is passed and the dynamic construction cost is less than or equal to the target cost, and the current design change plan is determined as the final execution design change plan.

[0026] Optionally, the estimated cost includes the price of raw materials, procurement cost and manufacturing cost.

[0027] Optionally, after step S6, the method further includes:

[0028] S7: After the second feasibility judgment is passed, the current design change plan is determined to be the execution design change plan, and the design change plan is executed.

[0029] According to one aspect of the present invention, a ship design cost control system is also provided, and the ship design cost control system further includes:

[0030] Initialization setting module, used to set the price of raw materials, purchase cost, manufacturing cost, engineering target cost, change classification and change reason;

[0031] Design change process management module, used for design change process management, setting application, review, proofreading, cost assessment and execution processes for different roles and permissions;

[0032] Design change impact analysis module, used to analyze the impact of upstream and downstream related factors on the design change plan;

[0033] A feasibility judgment module is used to judge whether the design change plan is feasible based on the impact analysis results;

[0034] Design change cost calculation module, used to predict the estimated cost of design changes based on impact analysis and initial settings;

[0035] The secondary feasibility judgment module is used to judge whether the design change plan is feasible based on the comparison results between the estimated cost and the target cost.

[0036] Optionally, the ship design cost control system also includes:

[0037] The execution module is used to determine the current design change plan as the execution design change plan after the secondary feasibility judgment is passed, and execute the design change plan.

[0038] Compared with the prior art, the ship design cost control method and system of the present invention has at least the following beneficial effects:

[0039] The ship design cost control method of the present invention includes initializing the price of raw materials, procurement cost, manufacturing cost, engineering target cost, ship design change classification and ship design change reasons. Based on the reasons for the ship design changes, a design change plan is designed and a design change application is initiated. Based on the design change plan and the design change application, an impact analysis is performed on the design change plan. A feasibility judgment is made based on the impact analysis results. After the first feasibility judgment is passed, the estimated cost to be generated by the design change is calculated, and a second feasibility judgment is made based on the estimated cost. After the second feasibility judgment is passed, the current design change plan is executed. Furthermore, the present invention performs two feasibility judgments on the design change through impact analysis and change cost evaluation, which can realize the full process management of design changes, and the dynamic construction cost is controllable, traceable and visible. Based on the upstream and downstream impact analysis to calculate the cost generated by the design change, the accuracy of the actual construction cost is greatly improved, which can realize the cost control of ship design quality and is conducive to controlling shipbuilding costs.

[0040] Moreover, the present invention truly realizes the control of the entire process of shipbuilding costs in digital terms, thereby achieving the purpose of reducing shipbuilding costs. It can be applied not only to ship design quality cost control, but also to other industries where design quality costs need to be controlled.

[0041] The ship design cost control system of the present invention is applied to the above-mentioned ship design cost control method and also has the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a flow chart of the steps of the ship design cost control method described in an embodiment of the present invention;

[0043] Figure 2 It is a schematic diagram of the structure of the ship design cost control system described in an embodiment of the present invention;

[0044] Figure 3 Schematic diagram of equipment change impact analysis in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following specific embodiments illustrate the embodiments of the present invention, and those familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0046] It should be noted that the diagrams provided in the embodiments of the present invention are only used to illustrate the basic concept of the present invention in a schematic manner. Although the diagrams only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, the form, quantity and proportion of each component can be changed at will during actual implementation, and the layout of the components may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this application, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by the present invention.

[0047] Shipbuilding costs mainly include the cost of the design stage, the cost of the procurement link and the cost of the manufacturing link. In order to maximize profits, major shipbuilding companies have established a target cost management system that meets actual needs. However, due to the difficulty in solidifying the technical status, shipowners' ship inspections and on-site optimization have led to design changes. These design changes have not been analyzed and controlled based on costs, namely raw material costs, procurement costs, and production costs, resulting in differences between actual construction costs and target costs, affecting corporate profits.

[0048] Therefore, in order to control the dynamic construction cost of ships and reduce the shipbuilding cost, the present invention provides a ship design cost control method and system to manage design changes, and achieve the purpose of controlling construction costs through impact analysis and change cost calculation and statistics.

[0049] The present invention is described in detail below with reference to specific examples.

[0050] Example 1

[0051] This embodiment provides a ship design cost control method, referring to Figure 1 , the ship design cost control method includes:

[0052] S1: Initialize the price of raw materials, procurement cost, manufacturing cost, engineering target cost, ship design change classification and reasons for ship design change;

[0053] Specifically, the price of raw materials, procurement cost, manufacturing cost, engineering target cost, ship design change classification and ship design change reason are set in the system. Among them, the price of raw materials, procurement cost, manufacturing cost and engineering target cost can be entered according to the actual price cost. The ship design change classification and ship design change reason can be shown in Table 1 below.

[0054] Table 1

[0055]

[0056]

[0057] S2: Based on the reasons for the ship design change, design the design change plan and initiate a design change application;

[0058] Specifically, based on the change reason in step S1, a design change plan is designed and a design change application is initiated.

[0059] S3: Based on the design change plan and design change application, conduct impact analysis on the design change plan;

[0060] Specifically, after initiating the design change application in step S2, the impact analysis of upstream and downstream related factors is performed on the design change plan. This step can be operated in the relevant software platform. The feasibility of the design change or the impact range of the design change is determined based on the impact analysis results. For example, Figure 3 The impact analysis of equipment changes shown in the figure shows that if the equipment technical requirements are changed, it may lead to changes in the equipment technical agreement, equipment ordering, schematics, layout drawings and other related parts signals or positions. Therefore, whether to make a design change requires comprehensive consideration of the impact range of the design change, the difficulty of the change, etc., to determine whether to make the change.

[0061] S4: Conduct a feasibility assessment based on the impact analysis results;

[0062] Specifically, a feasibility judgment is made based on the results of the impact analysis. When the impact range of the design change is large, the change is complex, and it is difficult, the feasibility judgment can be determined to be no, and the design change process is terminated.

[0063] When the impact of the design change is small and the change is simple, the feasibility judgment can be determined to be yes, and the following step S5 of estimating the change cost is continued. A feasibility judgment can be manually set according to the needs to determine whether the impact is large or small, and the judgment standard of the change difficulty is not repeated here.

[0064] S5: After a feasibility assessment is passed, the estimated cost of the design change is calculated;

[0065] Specifically, after a feasibility judgment in step S4 is passed, the estimated cost of the design change is calculated. The estimated cost of the design change is estimated based on the impact analysis and initialization settings. For example, the estimated cost includes raw material cost, procurement cost and manufacturing cost.

[0066] For example, if the cable is changed from 25 meters to 30 meters in length, and the cable has been installed on the ship, it does not affect the construction of other parts. At this time, the cost is calculated as follows:

[0067] 1) Raw material cost: 30*35 (yuan / m) = 1050 yuan;

[0068] 2) Design hours (2 hours) + purchasing hours (1 hour) + installation hours (8 hours) + management hours (2 hours) = 13*70 (yuan / hour) = 910 yuan;

[0069] At this time, the estimated cost of the change = 1050 + 910 = 1960 yuan. If the change involves demolition, the installation hours also need to include the demolition hours.

[0070] S6: Make a secondary feasibility judgment based on the estimated cost.

[0071] Specifically, after the estimated cost is calculated in step S5, the estimated cost is added to the cost of the unchanged part to form a dynamic construction cost, and the dynamic construction cost is compared with the target cost. If the dynamic construction cost of the entire cable ship exceeds the total target cost of the project at this time, this design change cannot be passed and the design change plan needs to be reconfirmed. Based on the redesigned design change plan, steps S2 to S6 are re-executed until a feasibility judgment is passed and the dynamic construction cost is less than or equal to the target cost, and the current design change plan is determined as the final execution design change plan. If the dynamic construction cost of the cable does not exceed the total target cost of the project, this design change plan is valid and the subsequent execution steps can be performed.

[0072] S7: After the secondary feasibility judgment is passed, the current design change plan is determined to be the execution design change plan, and the execution design change plan is executed.

[0073] Specifically, after the second feasibility judgment is passed, the final design change plan is confirmed and executed. In this embodiment, the design change can be executed in a related software platform, that is, the related drawings or models are modified to complete the design change.

[0074] Example 2

[0075] This embodiment also provides a ship design cost control system, referring to Figure 2 The ship design cost control system includes an initialization setting module, a design change process management module, a design change impact analysis module, a first feasibility judgment module, a design change cost calculation module, a second feasibility judgment module and an execution module.

[0076] Specifically, the initialization setting module is used to set the price of raw materials, procurement cost, manufacturing cost, engineering target cost, change classification and change reason. The initialization setting module can be associated with the enterprise's ERP system to directly obtain the relevant raw material procurement cost, production cost information and engineering target cost, or a database can be built to enter the raw material procurement cost, production cost information and engineering target cost. Change information such as the classification and change reason of the design change also needs to be entered into the system. The design change process management module is used for design change process management, setting up application, review, proofreading, cost evaluation and execution processes for different roles and different permissions, and using the process to control design costs. The design change impact analysis module is used to analyze the impact of upstream and downstream related factors on the design change plan. In order to evaluate whether the design change is reasonable, it is necessary to analyze the impact of the upstream and downstream related factors caused by the change, and judge whether the design change is feasible or the scope of impact caused by the change based on the analysis results. The one-time feasibility judgment module is used to judge whether the design change plan is feasible based on the impact analysis results. The design change cost calculation module is used to predict the estimated cost of the design change based on the impact analysis and initialization settings. The possible design change costs, i.e., the cost of raw materials and manufacturing costs, are calculated based on the scope of impact caused by the change, and the calculated costs are saved in the cost library of similar materials, and compared with the target cost based on the accumulated material construction cost library. If the dynamic material construction cost library is less than the target cost, the design change is valid. The secondary feasibility judgment module is used to judge whether the design change plan is feasible based on the comparison results of the estimated cost and the target cost. The execution module is used to determine the current design change plan as the execution design change plan after the secondary feasibility judgment is passed, and execute the design change plan.

[0077] In summary, the ship design cost control method of the present invention includes initializing the price of raw materials, procurement cost, manufacturing cost, engineering target cost, ship design change classification and ship design change reasons. Based on the reasons for the ship design changes, a design change plan is designed and a design change application is initiated. Based on the design change plan and the design change application, an impact analysis is performed on the design change plan. A feasibility judgment is made based on the impact analysis results. After the first feasibility judgment is passed, the estimated cost to be generated by the design change is calculated, and a second feasibility judgment is made based on the estimated cost. After the second feasibility judgment is passed, the current design change plan is executed. Furthermore, the present invention performs two feasibility judgments on the design change through impact analysis and change cost evaluation, which can realize the full process management of design changes, and the dynamic construction cost is controllable, traceable and visible. Based on the upstream and downstream impact analysis to calculate the cost generated by the design change, the accuracy of the actual construction cost is greatly improved, which can realize the cost control of ship design quality and is conducive to controlling shipbuilding costs.

[0078] Moreover, the present invention truly realizes the control of the entire process of shipbuilding costs in digital terms, thereby achieving the purpose of reducing shipbuilding costs. It can be applied not only to ship design quality cost control, but also to other industries where design quality costs need to be controlled.

[0079] The ship design quality cost control system of the present invention is applied to the above-mentioned ship design quality cost control method, and also has the above-mentioned technical effects.

[0080] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A ship design cost control method, characterized in that: include: S1: Initialize the price of raw materials, procurement cost, manufacturing cost, engineering target cost, ship design change classification and reasons for ship design change; S2: Based on the reasons for the ship design change, design a design change plan and initiate a design change application; S3: Based on the design change plan and the design change application, perform an impact analysis on the design change plan; S4: Conduct a feasibility assessment based on the impact analysis results; S5: After a feasibility assessment is passed, the estimated cost of the design change is calculated; S6: Perform a secondary feasibility determination based on the estimated cost.

2. The ship design cost control method according to claim 1, characterized in that: The step of conducting an impact analysis on the design change plan based on the design change plan and the design change application includes: Conduct an impact analysis of upstream and downstream related factors on the design change plan; Determine whether the design change plan is feasible based on the impact analysis results.

3. The ship design cost control method according to claim 1, characterized in that: The steps for making a feasibility assessment based on the impact analysis results include: When the result of a feasibility judgment is yes, continue to step S5; When the result of a feasibility judgment is no, the design change process is terminated.

4. The ship design cost control method according to claim 1, characterized in that: The step of calculating the estimated cost of the design change and performing a secondary feasibility determination based on the estimated cost includes: Calculate the estimated cost of design changes based on impact analysis and initial settings; The estimated cost is added to the cost of the unchanged part to form a dynamic construction cost; comparing the dynamic construction cost with a target cost; A secondary feasibility judgment is made based on the comparison results.

5. The ship design cost control method according to claim 4, characterized in that: The steps of making a secondary feasibility judgment based on the comparison results include: If the dynamic construction cost is greater than the target cost, the design change plan is redesigned.

6. The ship design cost control method according to claim 5, characterized in that: After the redesign change plan design step, it also includes: Based on the redesigned design change plan, steps S2 to S6 are re-executed until a feasibility judgment is passed and the dynamic construction cost is less than or equal to the target cost, and the current design change plan is determined as the final execution design change plan.

7. The ship design cost control method according to claim 1, characterized in that: The estimated costs include the price of raw materials, procurement costs and manufacturing costs.

8. The ship design cost control method according to claim 1, characterized in that: After step S6, the method further includes: S7: After the secondary feasibility judgment is passed, the current design change plan is determined to be the execution design change plan, and the execution design change plan is executed.

9. A ship design cost control system, characterized in that: The ship design cost control system also includes: Initialization setting module, used to set the price of raw materials, purchase cost, manufacturing cost, engineering target cost, change classification and change reason; Design change process management module, used for design change process management, setting application, review, proofreading, cost assessment and execution processes for different roles and permissions; Design change impact analysis module, used to analyze the impact of upstream and downstream related factors on the design change plan; A feasibility judgment module is used to judge whether the design change plan is feasible based on the impact analysis results; Design change cost calculation module, used to predict the estimated cost of design changes based on impact analysis and initial settings; The secondary feasibility judgment module is used to judge whether the design change plan is feasible based on the comparison result between the estimated cost and the target cost.

10. The ship design cost control system according to claim 9, characterized in that: The ship design cost control system also includes: The execution module is used to determine that the current design change plan is the execution design change plan after the secondary feasibility judgment is passed, and execute the execution design change plan.

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