Sequential Quality-Quantity Type Second Order Rotatable Design

The concept of sequential experimentation in rotatable designs is quite old. In these experiments the factors influencing the response were quantitative only. Rotatable designs with both qualitative and quantitative factors were introduced at second order by Adhikary and Panda (1992). In this paper the concept of sequential experimentation for QQTSORD (Quality Quantity Type Second Order Rotatable Design) has been introduced when the corresponding rotatable design is a central composite design. The method has been explained for 5 quatitative and 2 qualitative factors.