Research Article

Short-Run Control Chart for Multiproducts with Multi-Items Based on Unequal Means and Variances

Table 1

Basic statistics of four SPC products.


Lamp bracket of PrideHeight of bent2440.00
Length to the edge of bent24200.01
Width to the edge of bent24140.01
Punch diameter2410.80

Lock protection of SamandHeight of bent 12440.00
Height of bent 22420.00
Distance to punch center24100.01

Lock protection of 206Height of bent2420.00
Punch diameter2410.20

Lower holder of injectorLength24300.01
Height of bent 12470.00
Height of bent 22470.01