A method of design scheme optimization decision-making based on quality function configuration and rough set theory was proposed aiming at the problem that the diversity and difference of users are not fully considered in the multi-objective optimization decision-making process of design scheme under cloud service mode. The design decision-making process mode and fuzzy evaluation mechanism participated by users were introduced based on the analysis of cloud service mode in order to meet the needs of users cluster analysis and intelligent transformation. The evaluation index system of design scheme for user needs was established to quantify the importance of evaluation index of design scheme in the process of networked collaborative design. The third-order model of design scheme optimization decision under cloud service mode was proposed according to the principle of combining science and system. The model was solved combined with rough set theory and rough approximation ideal solution. The validity and feasibility of the method were verified by taking yacht design scheme on cloud service platform as an example.
Fig.2Demand transformation based on house of quality
一级
二级
需求
美观性需求R1
美学性R11
色彩搭配合理,科技与艺术结合
时代性R12
造型美观大方,具有时代精神意义
协调性R13
协调的比例和尺度、完美的造型
创新性需求R2
先导性R21
设计理念独特新颖
附加值R22
提高产品附加值和品牌价值
个性化R23
独具一格,个性化定制
功能性需求R3
可靠性R31
材料运用合理,品质精良
实用性R32
功能合理,满足用户多方面的要求
技术性R33
性能稳定,技术先进,提高产品竞争力
Tab.1User demand information of yacht design task
一级需求
一级需求重要程度
二级需求
二级需求重要程度
美观性需求R1
0.150 6
美学性R11
0.678 5
美观性需求R1
0.150 6
时代性R12
0.417 1
美观性需求R1
0.150 6
协调性R13
0.578 1
创新性需求R2
0.916 1
先导性R21
0.436 4
创新性需求R2
0.916 1
附加值R22
0.617 2
创新性需求R2
0.916 1
个性化R23
0.218 2
功能性需求R3
0.371 5
可靠性R31
0.669 1
功能性需求R3
0.371 5
实用性R32
0.206 4
功能性需求R3
0.371 5
技术性R33
0.523 1
Tab.2Importance of user requirements for yacht
Fig.4Evaluation index system of yacht design
一级需求
二级需求
美观性指标I1
创新性指标I2
功能性指标I3
美学性I11
时代性I12
先导性I21
个性化I22
可靠性I31
技术性I32
R1
R11
1
0.675 2
0.528 8
0.628 8
0.716 3
0.716 3
R1
R12
0.756 5
1
0.116 9
0.116 9
0.116 9
0.083 1
R1
R13
0.804 7
0.704 7
0.117 4
0.117 4
0.068 8
0.068 8
R2
R21
0.302 2
0.365 2
1
0.567 5
0.547 6
0.547 6
R2
R22
0.217 5
0.217 5
0.701 1
0.760 2
0.134 6
0.134 6
R2
R23
0.355 6
0.201 6
0.695 8
1
0.064 8
0.064 8
R3
R31
0.454 8
0.451 2
0.514 9
0.614 9
1
0.760 8
R3
R32
0.267 6
0.267 6
0.318 5
0.218 5
0.601 2
0.701 2
R3
R33
0.395 4
0.295 4
0.444 2
0.344 2
0.844 2
1
Tab.3Relationship matrix between user requirement and evaluation index for yacht
Fig.3Demand transformation of yacht design
Fig.5Weight of evaluation index of yacht design
评价指标
二级指标
设计方案
S1
S2
S3
S4
S5
S6
I1
I11
[0.072,0.085]
[0.078,0.096]
[0.051,0.069]
[0.036,0.053]
[0.072,0.107]
[0.017,0.021]
I1
I12
[0.011,0.013]
[0.007,0.010]
[0.003,0.006]
[0.021,0.025]
[0.045,0.067]
[0.014,0.016]
I2
I21
[0.061,0.070]
[0.046,0.058]
[0.026,0.039]
[0.006,0.008]
[0.015,0.022]
[0.004,0.005]
I2
I22
[0.004,0.005]
[0.004,0.005]
[0.006,0.009]
[0.002,0.002]
[0.004,0.005]
[0.005,0.008]
I3
I31
[0.016,0.021]
[0.013,0.017]
[0.031,0.042]
[0.011,0.015]
[0.025,0.034]
[0.011,0.013]
I3
I32
[0.008,0.011]
[0.012,0.021]
[0.003,0.004]
[0.005,0.006]
[0.008,0.013]
[0.006,0.008]
Tab.4Rough evaluation matrix of yacht design
评价指标
二级指标
正理想解
负理想解
S1
S2
S3
S4
S5
S6
S1
S2
S3
S4
S5
S6
I1
I11
0.028
0.037
0.013
0.058
0.058
0.005
0.018
0.013
0.037
0.025
0.025
0.069
I1
I12
0.008
0.005
0.002
0.014
0.035
0.002
0.001
0.005
0.008
0.031
0.015
0.043
I2
I21
0.039
0.026
0.009
0.006
0.012
0.001
0.006
0.019
0.037
0.010
0.005
0.014
I2
I22
0.000
0.001
0.004
0.000
0.003
0.005
0.005
0.004
0.002
0.006
0.004
0.002
I3
I31
0.006
0.002
0.024
0.003
0.019
0.001
0.024
0.027
0.008
0.021
0.007
0.022
I3
I32
0.007
0.014
0.000
0.001
0.007
0.003
0.011
0.006
0.017
0.008
0.004
0.006
Tab.5Positive and negative ideal solutions of yacht design scheme
设计方案
正理想解
负理想解
贴近度
S1
0.333
0.302
0.525
S2
0.355
0.306
0.537
S3
0.240
0.402
0.374
S4
0.328
0.308
0.539
S5
0.337
0.305
0.526
S6
0.413
0.202
0.309
Tab.6Close degree of yacht design
Fig.6Yacht design optimization scheme(S4)
Fig.7Satisfaction evaluation for yacht design
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