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 .

2. What is the overall standard time for stat orders?

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 . 2. What is the overall standard time for stat orders?

Solution

first we calculate actual time and std time.

Std time = time taken x performance rating.

Observed time = 383.56813 min

Std time-=385.935 minutes

The difference is within expectations as the differene is only 2.37 min within 25% of std time.

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	24.309375	23.09390625
Hem 18	1.03	29	38	24	39	27	26	20	23	27	26	28	28	34	37	29	27.251875	28.06943125
Apter	1.11	27	36	35	35	36	27	29	33	29	33	34	40	36	32	28	30.694375	34.07075625
AMY	0.97	28	37	29	27	28	29	27	26	25	24	25	28	22	31	22	25.560625	24.79380625
Ca	1.09	38	44	33	34	21	23	20	28	23	27	22	27	27	29	25	26.380625	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	28.250625	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	31.435625	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	28.564375	29.42130625
AST	1.05	29	39	28	31	29	33	28	32	34	32	34	32	33	29	32	29.753125	31.24078125
BBSP	0.94	26	32	18	26	39	28	31	29	26	28	31	29	19	28	32	26.43375	24.847725
																	383.56813	385.9349063