Important steps in parameter esign Define ideal performance Select best sn definition Identify critical parameters Develop sets of noises that will cause performance to deviate from ideal Use designed experiments to systematically optimize control parameters C Don Clausing 1998 人 16881 Fig. 11
Important steps in parameter design • Define ideal performance • Select best SN definition • Identify critical parameters • Develop sets of noises that will cause performance to deviate from ideal • Use designed experiments to systematically optimize control parameters © Don Clausing 1998 16.881 Fig. 11
Three kinds of product noise Environment; e.g., ambient temperature Manufacturing -no two units of production are exactly alike Deterioration-causes further variations in the components of the system C Don Clausing 1998 人 16881 Fig. 12
Three kinds of product noise • Environment; e.g., ambient temperature • Manufacturing – no two units of production are exactly alike • Deterioration – causes further variations in the components of the system © Don Clausing 1998 16.881 Fig. 12
Searching for robustness 1. Select one combination of control-factors values 2. Test performance when a set of noise values are applied: y1, y2.. yn are performance values for n combinations of noise 3. Change values of control factors; repeat 2 4. Search through control-factor space, testing each point with same set of noises C Don Clausing 1998 人 16881 Fig. 13
Searching for robustness 1.Select one combination of control-factors values 2.Test performance when a set of noise values are applied: y 1, y2 … yn are performance values for n combinations of noise 3. Change values of control factors; repeat 2. 4. Search through control-factor space, testing each point with same set of noises © Don Clausing 1998 16.881 Fig. 13