Table 3.

Labor Sparing Using Rotating Weeks (B) and Standard (A): 2-wk Quarantine After Infection

Infection	0.10			0.25			0.40
Mortality	0.10			0.10			0.10
	% Working		Savings	% Working		Savings	% Working		Savings
Week	A	B		A	B		A	B
1	100.0	100.0	0.0	100.0	100.0	0.0	100.0	100.0	0.0
2	89.9	100.0	10.1	75.1	100.0	24.9	60.0	100.0	40.0
3	80.8	90.2	9.4	56.6	74.9	18.3	36.3	60.1	23.8
4	82.1	89.9	7.8	65.1	74.8	9.7	58.1	59.9	1.9
5	83.2	90.4	7.3	71.5	78.8	7.4	71.2	72.4	1.2
6	84.1	90.0	5.9	76.3	78.8	2.5	78.9	72.6	−6.4
7	85.0	90.4	5.4	79.8	81.8	1.9	83.1	79.5	−3.6
8	85.5	90.4	4.9	82.3	82.1	−0.2	85.8	79.4	−6.3
9	86.0	90.2	4.2	84.1	83.9	−0.1	87.4	83.4	−4.0
10	86.4	90.0	3.5	85.3	83.8	−1.5	88.5	83.5	−5.0
11	86.8	90.1	3.3	86.4	85.6	−0.8	89.2	86.1	−3.0
12	87.2	90.4	3.1	87.4	85.4	−2.0	89.5	86.2	−3.3
13	87.6	90.2	2.6	88.0	87.0	−0.9	89.7	87.6	−2.1
14	87.9	90.1	2.1	88.5	86.5	−2.0	89.9	87.4	−2.6
15	87.9	90.3	2.5	88.8	87.6	−1.2	90.0	88.7	−1.3
16	88.0	90.5	2.4	89.1	87.3	−1.7	90.1	88.3	−1.7
17	88.3	90.1	1.8	89.2	88.4	−0.9	90.1	89.1	−1.0
Mean (SD)	4.5 (2.8)			3.1 (7.8)			1.6 (12.0)
Reference	Figure 4			Figure 5			Figure 6

Quarantine: number of weeks a staff member stays off of work after being infected. Infection: probability of an uninfected staff becoming infected in a given week at work. Mortality: probability of an infected staff member succumbing to the coronavirus. % working: percentage of starting staff working for the given week. Savings: absolute difference between scenario B (rotating weeks, 7–12 h shifts) and scenario A (standard 8-h shifts each week). Scenarios rotating weeks (B) and standard (A) are compared on the absolute difference for each week in the percentage of the starting labor force. We assume infection probabilities of 0.10, 0.25, and 0.40, a 2-wk sick leave for infected staff who survive, and a mortality probability of 0.10. The Table shows numerical results from Figures 4–6.

Abbreviation: SD, standard deviation.