To activate the Results Sheet, select Results from the View menu.

 

Each pattern in the solution is described through the following column sections:

· Pattern: Shows the consecutive index of the pattern and the material used.

· Percentages: Shows the yield, offcut and waste percentages.

 

Note: The yield percentage is calculated hardly, that is, it will not include either reusable offcut or Cut Width option areas (the last one is considered waste).

 

· Repetition: Indicates the pattern’s multiplicity, that is, the number of times it should be repeated. Both a Theoretic value for the theoretic solution and a Real value for the integer solution are shown.

 

· Parts/Pattern: This section contains as many columns as parts are in the launch. The values in these columns indicate the number of times the corresponding parts are repeated in the pattern.

 

When analyzing calculation results keep in mind the folowing:

 

· The last three rows of the spreadsheet show totals for both solutions.

 

· Patterns with null (zero) repetition are considered outside the integer solution.

 

· The real total of repetition indicates the total amount of material used.

 

· The theoretic total of yield is an upper bound of the maximum yield reachable by the integer solution. For a single material, the theoretic total of repetition is a lower bound for the real optimum repetition value. Whether the theoretic repetition rounds up to the real repetition, the integer solution is optimum too.

 

Note: This is true for the rounded-exact integer solution only which is the only feasible one according to the mathematical model. Both the rounded-up and the rounded-down solutions could have either greater or lesser yields as they are optimum only for the part quantities actually obtained which are not, in general, the requested ones.

 

· A low value of yield is a sign of that a better optimization will need:

 

- To include more parts in the launch.

- To change the material dimensions.

- To modify the technological options.

 

· The total (global) percentage of yield is calculated as follows:

 

PartsTotalArea/MaterialsTotalArea = SUM(PatternPartsArea(i)*PatternRepetition(i))/SUM(PatternMaterialArea(i)*PatternRepetition(i))

 

for  i=1,2,...,number of pattern

 

which will not coincide, in general, with the average of all the values in the column. The offcut and waste percentages are calculated in a similar way.

 

· Each part total in both solutions is calculated by adding the product:

 

<pattern repetition>*<part repetition>

 

over all the patterns. The Parts Total (as a whole) should coincide with the Parts Request in both the theoretic and the rounded-exact integer solutions provided enough material is available.

 

Tip: To see the difference between the Real and the Request, instead of the Parts Total, check  Real vs Request  in the View menu.

 

· The last row shows the real total yield broken down per parts.

 

· All the repetitions and totals in the integer solution are shown according to the active rounding. To change the active rounding, select Rounding from the View menu.

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6.1

Analyzing Results

6

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