Data Collection Ratings

Data Collection Ratings

**Table 1. Data collection ratings (DCR) for various 305-day records**
Test plan	Number of Test Days	Data Collection Ratings
Daily	305	104
Labor Efficient Record 10-d mean 5-d mean	100 ¹ 50 ²	104 103
Monthly Supervised All milkings ³ 2 of 3 milkings 1 of 2 milkings 1 of 3 milkings	10 10 10 10	100 97 95 90
Monthly Owner-sampler All milkings ³ 2 of 3 milkings 1 of 2 milkings 1 of 3 milkings	10 10 10 10	75 73 72 69
Bi-monthly Supervised All milkings ³ 2 of 3 milkings 1 of 2 milkings 1 of 3 milkings	5 5 5 5	95 90 86 78
Bi-monthly Owner-sampler All milkings ³ 2 of 3 milkings 1 of 2 milkings 1 of 3 milkings	5 5 5 5	72 69 67 62

^{1 A 10-day average reported in each of 10
months.

² A 5-day average reported in each of 10 months.

³ Milk weights were obtained from all milkings on each test day.}

Table 2. Data collection ratings for records of < 305-days with supervised monthly testing

		First-lactation DCR		Later-lactation DCR
Test	Days in Milk	All ¹	AM-PM ²	All ¹	AM-PM ²
1	15	36	27	23	18
2	45	49	42	39	33
3	75	61	53	54	47
4	105	71	63	67	60
5	135	80	72	78	70
6	165	87	80	86	79
7	195	92	86	92	85
8	225	96	90	96	90
9	255	99	93	99	93
10	285	100	95	100	95
¹ Milk weights were obtained from all milkings on each test day. ² Only one of the two milkings was weighed on each test day.