[Retracted] Quality Improvement and Robust Design Methods to a Pharmaceutical Research and Development

Table 1

General layout of the proposed methodology.

Design points	Control factors	Experimental observations	Estimate
	𝑥1,𝑥2,...,𝑥𝑓		Mean	Variance
1	Experimental design	𝑦1,…𝑦𝑛1,𝑇1,…,𝑇𝑚1	𝜇1	𝜎1
2		𝑦1,…𝑦𝑛2,𝑇1,…,𝑇𝑚2	𝜇2	𝜎2
⋮		⋮	⋮	⋮
𝑖		𝑦1,…𝑦𝑛𝑖,𝑇1,…,𝑇𝑚𝑖	𝜇𝑖	𝜎𝑖
⋮		⋮	⋮	⋮
d		𝑦1,…𝑦𝑛𝑑,𝑇1,…,𝑇𝑚𝑑	𝜇𝑑	𝜎𝑑