PHASE II REPORT - Caltrans

5.3.3 ACT Test
For this test, the condition variables are:
• X1 Cure Temperature
• X2 Cure Time
• X3 Cure Humidity
Three replications of a half replication of a 2-cubed factorial will be used for this experiment.
One such plan is given below with the coded values for the conditions:
Table 5.2: Three Replications of a Half Replication of a 2-Cubed Factorial
Observation. X1 X2 X3
5.3.4 Randomization Requirements
1 -1 -1 +1
2 -1 +1 -1
3 +1 -1 -1
4 +1 +1 +1
It is essential that the experiments be carried out in a randomized order so that there will be a
valid estimation of the true experimental error standard deviation as well as the precise
estimation of the effects of the condition variables. Randomization made the conduct of the
equipment less efficient; however, it was necessary to properly address ruggedness. This was
originally intended to be done by the project team using the procedure specified by the project
statistician.
5.4 CONCLUSIONS AND RECOMMENDATIONS
As noted earlier in Section 1.0, a second no-cost extension to the project was denied and the
conclusions and recommendations section of the ruggedness testing was not conducted. More
research should be considered in order to evaluate the ruggedness of the testing apparatus
developed for this project.
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