The term "shift size" is correct and can be used in written English.
It is often used to refer to the number of workers scheduled to be present during a particular shift. For example, "Due to an increase in demand, the shift size at the factory was adjusted from five workers to seven."
In addition, a random shift size is considered for two types of design.
A random shift size is considered during the economic design selection.
The effects of misspecification of the shift size on the performance of the SSGR chart are also illustrated based on numerical examples for different input parameters.
As a consequence, when the actual shift size differs from the value assumed at the chart design stage, the performance of the control chart can be seriously affected.
The design of quality control charts is normally carried out considering a process shift size that is considered important to be detected.
This paper proposes two optimization algorithms for the RS-γ charts, i.e. by minimizing (i) the average run length (ARL) for a deterministic shift size and (ii) the expected ARL over a process shift domain.
It can be easily implemented and numerical results show that it balances protection against a broad range of shift sizes.
For optimum implementation, this paper develops two optimal design strategies for the synthetic t chart with estimated process mean, by minimizing (i) the average run length (ARL) and (ii) the expected ARL, for deterministic and unknown shift sizes, respectively.
Evaluating the estimator for different shift sizes, they concluded that it provides accurate results.
This investigation can be extended to other shift sizes and control chart scenarios for the time estimates.
However, the medium shift sizes are underestimated, although this slight bias must be considered in the context of their corresponding standard deviations.
