63 The emergency department in a major medical center has de

6.3 The emergency department in a major medical center has delays in the stat laboratory
tests turn - around time (TAT). According to standards, the stat lab results should be
reported within 30 minutes. The analyst conducted a time study to measure the reporting
times for fourteen different lab tests over fi fteen observations. The performance
ratings of the personnel handling the test are also recorded in Table EX 6.3 .

1. Using the basic - low allowance, calculate the standard time for each lab test.

6.3 The emergency department in a major medical center has delays in the stat laboratory tests turn - around time (TAT). According to standards, the stat lab results should be reported within 30 minutes. The analyst conducted a time study to measure the reporting times for fourteen different lab tests over fi fteen observations. The performance ratings of the personnel handling the test are also recorded in Table EX 6.3 . 1. Using the basic - low allowance, calculate the standard time for each lab test.

Solution

Std time is calculated for each group as mean x performance rating as performance rating std is 1.

Hence std time for this = 385.9349063

Observation in minutes
performance
Lab Test	Rating	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	Mean	perf rating*Mean
Hem 8	0.95	28	34	29	33	21	18	26	23	30	24	23	24	20	27	28	24.30938	23.09390625
Hem 18	1.03	29	38	24	39	27	26	20	23	27	26	28	28	34	37	29	27.25188	28.06943125
Apter	1.11	27	36	35	35	36	27	29	33	29	33	34	40	36	32	28	30.69438	34.07075625
AMY	0.97	28	37	29	27	28	29	27	26	25	24	25	28	22	31	22	25.56063	24.79380625
Ca	1.09	38	44	33	34	21	23	20	28	23	27	22	27	27	29	25	26.38063	28.75488125
Glucose	0.98	52	54	49	43	51	56	60	37	39	40	29	43	44	50	43	43.18625	42.322525
Chem 7	1.01	28	37	27	35	33	30	31	27	25	33	32	34	29	25	25	28.25063	28.53313125
K	1.04	12	25	18	11	19	27	11	19	14	15	14	15	18	16	12	15.44	16.0576
HCG	0.98	18	29	16	20	23	15	15	14	16	18	19	22	18	18	21	17.68625	17.332525
ALP	0.97	29	39	30	32	32	34	32	34	32	34	34	38	36	33	33	31.43563	30.49255625
ALT	0.94	29	39	30	32	29	36	23	25	28	28	31	29	33	32	33	28.62125	26.903975
B	1.03	29	38	36	23	25	28	32	34	32	29	38	36	23	25	28	28.56438	29.42130625
AST	1.05	29	39	28	31	29	33	28	32	34	32	34	32	33	29	32	29.75313	31.24078125
BBSP	0.94	26	32	18	26	39	28	31	29	26	28	31	29	19	28	32	26.43375	24.847725
																		385.9349063