|
 There are many different milk testing plans that are currently being used for both milk weighing and component sampling. Data Collection Rating (DCR) was developed to compare the relative accuracy of different testing methods. The DCR value is affected by the frequency of testing, percentage of milkings weighed and sampled and the amount of supervision.
A value of 100 for milk and 100 for components is equal to monthly testing with all milkings weighed and sampled.
A value of 95 for milk and components is equal to monthly AM-PM testing with one out of two milkings weighed and sampled.
Many other common combinations of testing procedures are listed in the table below. The TriStar service table indicates the minimum DCR for milk for each level of TriStar. For pedigree publishing purposes, the minimum DCR
for components is 70 for all levels of TriStar.
TYPICAL DATA COLLECTION RATING (DCR) FOR EXAMPLE TEST PLANS
|
Test Plan* |
Data Collection/
305 Day Records |
Data Collection
Rating |
# Tests |
# Supervised
Tests |
Milk (DCRM) |
Components
(DCRC) |
|
| Labor Efficient Records (electronic) |
|
|
|
|
| 5 or 7 day average |
50 or 70 |
|
101-102 |
see options
below |
|
| Monthly |
|
|
|
|
| All milkings weighed and sampled |
10 |
10 |
99-100 |
99-100 |
|
| Monthly AM/PM |
|
|
|
|
| 2 out of 3 milkings weighed and sampled |
10
|
10
|
96-97
|
96-97
|
| 1 out of 2 milkings weighed and sampled |
10
|
10
|
94-95
|
94-95
|
| 1 out of 3 milkings weighed and sampled |
10
|
10
|
89-90
|
89-90
|
|
| 10x/Yr |
|
|
|
|
| All milkings weighed and sampled |
8
|
8
|
98-99
|
98-99
|
|
| 10x/Yr AM/PM |
|
|
|
|
| 2 out of 3 milkings weighed and sampled |
8
|
8
|
95-96
|
95-96
|
| 1 out of 2 milkings weighed and sampled |
8
|
8
|
92-93
|
92-93
|
| 1 out of 3 milkings weighed and sampled |
8
|
8
|
87-88
|
87-88
|
|
| Bi-Monthly |
|
|
|
|
| All milkings weighed and sampled |
5
|
5
|
95-97
|
95-97
|
| |
4
|
4
|
93-95
|
93-95
|
|
| Bi-Monthly AM/PM |
|
|
|
|
| 2 out of 3 milkings weighed and sampled |
5
|
5
|
90-92
|
90-92
|
| |
4
|
4
|
88-90
|
88-90
|
| 1 out of 2 milkings
weighed and sampled |
5
|
5
|
85-88
|
85-88
|
| |
4
|
4
|
82-85
|
82-85
|
| 1 out of 3 milkings weighed and sampled |
5
|
5
|
77-81
|
77-81
|
| |
4
|
4
|
73-76
|
73-76
|
|
| Quarterly |
|
|
|
|
| All milkings weighed and sampled |
3
|
3
|
90-93
|
90-93
|
|
| Quarterly AM/PM |
|
|
|
|
| 2 out of 3 milkings weighed and sampled
|
3
|
3
|
83-86
|
83-86
|
| 1 out of 2 milkings weighed and sampled |
3
|
3
|
77-80
|
77-80
|
| 1 out of 3 milkings weighed and sampled |
3
|
3
|
67-71
|
67-71
|
|
* Not all test plans listed above are eligible for all TriStar
service options - please compare DCR requirements of your TriStar option
to your test plan. |
