 |
|||
|
|
|||
| ||||||||||
|
|  MIL-J-7093A
(Weps)
Mean Value Index Rating. - The statistical control index rating,
4.5.2.9
Q x, for the mean values (4.5.2.8) shall be computed after each 200 firings.
While the reduced normal sampling schedule is in effect, the contractor shall
furnish the customer with copies of statistical control charts (4.5.2.4) along with
computed QR values (4.5.2.5) and Qx values (4.5.2.8) at least after each
200 firings. The computation shall include data from 50 sub-groups accumu-
lated prior to the time of calculating statistical control index ratings. Action
based on QR values has been previously specified in paragraph 4.5.2.7.
Action based on Qx values is as follows:
Q x has been greater than 85% for 200 consecutive firings;
4.5.2.9.1
(a) The value of Su must be greater than
(b) The assembled units represented by each group of four (4)
test units shall be accepted if the average value, X, of all the
ballistic properties specified (3.3.1) lies within the limits Su
and SL, (paragraph 4.6), and if all of the ballistic data for each
of the test units are individually within the acceptance limits.
(c) If the average value requirement is not met, the assembled
units represented by the four (4) test samples shall be tested in
accordance with the Intermediate Production Schedule of one
(1) firing per batch of propellant. If an individual value is
outside of the acceptance limits of 3.3.1,the lot shall be re-
jected. Failure to meet the condition (4.5.2.9.1(b) shall
not be cause for discontinuance of the Normal Sampling
Schedule.
Q x has not been greater than 85% for 200 consecutive firings;
4.5.2.9.2
(a) The value of Su must be greater than
(b) The assembled units represented by each group of four (4)
test units shall be accepted if the average value, , of all the
ballistic properties specified (3.3.1) lies within the limits SU a n d
SL, and if all the ballistic data for each of the test units are
individually within the acceptance limits (3.3.1).
(c) If the average value requirement is not met, the assembled
units represented by the four (4) test samples shall be tested in
accordance with the Intermediate Production Schedule of one
(1) firing per batch of propellant. Botches from which test units
have been selected under the Normal Sampling Schedule shall
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals