The QFD4Mat User Manual Ver.0.2 (TESTING)
Contents
1. left empty cell for no correlation between the key Factor the column of correlation matrix space of material you defined e g UTS in the example here below and the Key Product features the rows of correlation matrix space defined at Step 1 Note that a multiple correlation is possible since each key factor ie correlation matrix column can be linked to multiple product key features i e correlation matrix rows s Che oe Category E Direcdonotiproveinaid Technical Key Factors for Material and Process selection i H pu L ms 3 1 3 Proceed by this way to complete the analysis for each column namely for each Key Factor you might consider the direction of improvement e g either A or V the category P C or R and the correlation type strong e medium o weak Y strength no correlation See the final result in the example just below Step 4 Now you need to score the 4 candidate materials per each key factor by a 0 5 nondimensional scale To this scope for each column representing the key factor you included in the analyses at STEP 3 see the task 3 1 1 and per each candidate material you have to express the rate basing on a 0 5 scale Because key factor are usually measureable or quantifiable you may use the conversion module provided in the sheet TABLE 1 Convers2. draw the product VALUE CURVE proceed as follows 5 1 Activate the VALUE CURVES sheet note that data in BOX 2 have been automatically reported in the VALUE CURVES sheet These CURVES are not yet sorted by the lowest to highest value by the RELATIVE IMPORTANCE expressed in percentage This is clearly visible if you refer to dotted line relative importance data series in the diagram below The Value Curve For obtaining VALUE CURVES rt the bel box by def trie by You just need to sort correctly data as itis follows 5 3 1 select all the data in the BOX 3 see above 5 3 2 sort them in column by row 8 as itis shown in the example below Hi ca mip pena ecu The final result is shown in figure below
3. Fabrizio D Errico The QFD4Mat User Manual Ver 0 2 TESTING Annex to F D Errico Material Selections by a Hybrid Multi Criteria Approach e Springer NOTE Only the white colored cells are editable Active sheets Define materials QFD4Mat Bubble Maps Value Curves Failure Modes Table 1 Conversion 0 5 scale Table 2 ASHBY Indexes Table 3 Symbols for Ashby Indexes Step 1 1 Activate DEFINE MATERIAL sheet 1 2 Define candidate material write in cell the candidate material to screen UP TO 4 materials can be contemporarily screened Step 2 2 1 Activate the QFD4Mat sheet by click on the QFD4Mat tag LE J HEREIN B 2 2 Start to filling up white cells in the left shoulder of the matrix the Product Requirements or product key features chose one of seven failure modes 2 3 Insert the relative importance score 0 to 5 values are allowed E ame T7T H F Dircetion of improvement EE Technical Key Factors for Material Stomer LL and Process selection mE mna enia s 2 4 Complete the left shoulder of the QFD4Mat a maximum of 29 product key features are allowed in the free excel versio 8 product key features for Failure Modes 6 product key features for Material Cost subcategory 8 product key features for the Transf
4. ion 0 5 scale as shown in the example just below as usual consider white cell as the only editable cells 4 1 Activate the TABLE 1 Conversion 0 5 scale that reports the conversion table module 4 2 Define from left to right 4 2 1 the quantifiable key factor you want to convert in 0 5 non dimensional scale in the example we set the UTS measured in MPa 4 2 2 the direction of improvement by selecting direct in case the higher is the quantified key factor the higher is the product performance e g ultimate tensile strength UTS of material for a structural component or inverse in case the higher is the key factor value the lower is the performance of product e g material density for lightweight component 42 3 The data values from table database etc for each candidate material The final result is shown in figure below 4 3 Copy the values obtained by task 4 2 3 in the sheet QFD4Mat specifically in the first column of BOX 2 as itis shown below 4 4 Proceed as for the task 4 3 to complete the BOX 2 data The final result is shown below Final Score are calculated the comparative diagram is drawn and the Bubble Maps have been automatically drawn carefully verify before to check the BUBBLE MAPS by activating the BUBBLE MAP sheet that you have assigned to each Key Factor i e each column the category P C or R as you should have done in task 3 1 3 StepS To
5. ormation Cost subcategory 7 product key features for the Receptiveness category NOTE To the above product key features further GLOBAL PERFORMANCE INDEX can be added To calculate it when needed you may refer to file Global Material Index custom xls provided 3 1 Start to fill up the top of the matrix by completing per column 20 columns are avaliable in this free excle version as it follows 3 1 1 Write the Key Factors for Material and Process Selection hereinafter key factors or key features of material of your interest i Columna Category Dirserion of improvement Technical Key Factors for Material and Process selection os NOTE For the Failure MODE subcategory category it is suggested to refer to the sheet FAILURE MODE see figure below get e ISTE ERR IURIS m tene ern ee 3 1 2 Fill up for the Key Factors identified the a the Direction of Improvement choose A if improvement increases as key feature increase or W in the opposite case b the category of the key factors distinguishing in Performance C cost and Receptiveness c in the cells that build the correlation matrix space scrolling down the column for the specific key factor you are addressing define the type of correlation ie strong e medium o weak
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