Integrated process capability analysis with an application in backlight module

Process capability analysis for a multi-process product

“…Singhal [18] even applied PCIs to a multi-process performance analysis chart (MPPAC). Based on Singhal [18], Huang et al [4] developed a multi-process capability analysis chart (MPCAC) model to evaluate process capability of a backlight module. Singhal [18] and Huang et al [4] always followed a normal distribution.…”

“…Based on Singhal [18], Huang et al [4] developed a multi-process capability analysis chart (MPCAC) model to evaluate process capability of a backlight module. Singhal [18] and Huang et al [4] always followed a normal distribution. However, process data do not always follow a normal distribution based on the description in Sect.…”

“…For example, the key quality characteristics of a backlight module include: (1) length, (2) width, (3) thickness, (4) brightness, and (5) equalization. In addition, (1)-(3) are nominal-the-best characteristics, and (4) and (5) are larger-the-best characteristics [4]. The integrated process capability, C T , is defined by Huang et al [4], and it takes into consideration that a product usually holds many quality characteristics.…”

“…In addition, (1)-(3) are nominal-the-best characteristics, and (4) and (5) are larger-the-best characteristics [4]. The integrated process capability, C T , is defined by Huang et al [4], and it takes into consideration that a product usually holds many quality characteristics. Since this study uses index C pn to replace index C ps , product capability index C T can be defined as follows:…”

“…Furthermore, the other important problem is focusing on many bilateral products with asymmetric tolerances. Thus, Huang et al [4] develop a multi-process capability analysis chart (MP-CAC) model to evaluate process capability for a product consisting of smaller-the-better unilateral specifications, larger-thebetter unilateral specifications, and nominal-the-best bilateral specifications. Let indices C pu and C pl represent the x and y axes to evaluate the smaller-the-better and larger-the-better unilateral specifications, respectively.…”