Abstract
In the past, the authors have conducted a systematic and large scale experiment on a spray drying granulation. Based on the results, comparison was made between the traditional approach and parameter design including the evaluation of quality characteristic. Followings are the sequence of study : (1) parameter design using non-dynamic characteristics, (2) parameter design using dynamic characteristics, (3) optimization of duality characteristics after parameter design, (4) verification of the results by fluid analysis. In Quality Engineering, the use of dynamic characteristics is a common practice. But in the early stage of introducing Quality Engineering approaches to this company, the experiments using non-dynamic characteristics were purposely conducted to demonstrate the disadvantage of traditional experimentation. Those disadvantage include : (1) limitation in evaluation, (2) poor reproducibility of conclusions, (3) inability of evaluating function, (4) low efficiency of experi mentation. Such trials did help the engineers to shift their paradigms with respect to experimentation, also helped to move to the next step for the appli cation of dynamic characterisrics. In this report, the results from the experiments using non-dynamic characteristics were discussed. Some control factors were screened out and tile whole experiments were overviewed for next expriments to he conducted using dynamic characteristics.
