Design for Experiment (DOE) Blog Entry
Case Study When popcorn is made, there often remain corn kernels which are unpopped, even if the majority of the rest of the corn kernels have popped. To find out what factor causes the most impact on the loss of popcorn yield, three factors were identified: Diameter of bowls to contain the corn, 10 cm and 15 cm Microwaving time, 4 minutes and 6 minutes Power setting of microwave, 75% and 100% 8 runs were performed with 100 grams of corn used in every experiment, and the measured variable is the amount of "bullets" formed in grams and data collected are shown below: Factor A = diameter Factor B = microwaving time Factor C = power Run order A B C Bullets (grams) 1 + – – 3.68 2 - + – 2.68 3 – - + 0.74 4 + + - 1.68 5 + – + 0.95 6 + + + 0.32 7 – + + 0.68 8 – - - 3.12 Full Factorial From the graph, it can be seen that Factor C, the power, has the largest impact on the number of bullets formed. Factor B, the microwaving time, has the second largest impact on the number of bullets f...