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208 Abdulrahman Albar, Ahmad Elshennawy, Mohammed Basingab et al.

imposed upper bound for nurse staffing, which also impacts the upper bound of the last
fuzzy class. The maximum value for nurse staffing was 0.5, or 25 out of 50 beds, and
experts provided their evaluations on three fuzzy classes; “inadequate”, “partially
adequate”, and “adequate”. 30 total intervals were obtained from question three.
Table 4 contains answers from question four of the survey, regarding ER occupancy
rate, where the maximum occupancy rate was assumed to be 100 percent. Ten experts
provided intervals from their perspective on an appropriate lower and upper value for
each of the four fuzzy classes, “low”, “medium”, “high”, and “very high”. In total, 40
evaluated intervals were obtained to construct the membership functions.
Table 5 contains answers from the survey’s fifth question, and is concerned with
patient boarding. Similarly, to questions one, two, and three, this question was based on a
scenario with 50 beds, which was later converted to a ratio of boarded patients to the ER
capacity. The minimum and maximum intervals were specific at 0 and 20 patients,
respectively, which translated to ratios of 0 and 0.4. From the ten experts’ responses
across the four fuzzy classes, 40 evaluated intervals were obtained.

Table 3: Interval assignment for Table 4: Interval assignment for ER
nurse staffing occupancy rate

Table 5: Interval assignment for patient boarding