Problem Note 44328: Wu-Meeker critical values might decrease with the sales period
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The calculation of critical values in a SAS® Warranty Analysis Emerging Issues analysis is based on aspects of the Production Period (Wu-Meeker) model. The Wu-Meeker critical values should always monotonically increase with the sales period. If the underlying ETL data does not change from one run to the next, then monotonicity is guaranteed. The Emerging Issues critical value programs currently recalculate the next critical value independent of the critical values calculated in the prior run. An undetected data error in the ETL process could result in a non-monotonic pattern being locked-in, which might cause issues in subsequent Emerging Issues analysis runs. This problem (non-monotonic pattern) might be observed by viewing the critical values in an Emerging Issues detail chart. The critical value needs to be calculated as the maximum of the currently calculated value and the critical value for the previous in-service period.
There is currently no circumvention for this problem.
Click the Hot Fix tab in this note to access the hot fix for this issue.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS Warranty Analysis | Microsoft Windows Server 2003 Datacenter Edition | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 |
| Microsoft Windows Server 2003 Enterprise Edition | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 Standard Edition | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2003 for x64 | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2008 | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Microsoft Windows Server 2008 for x64 | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| 64-bit Enabled AIX | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| 64-bit Enabled Solaris | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| HP-UX IPF | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
| Linux for x64 | 4.3 | 5.1 | 9.2 TS2M3 | 9.3 TS1M0 | ||
A fix for this issue for SAS Warranty Analysis 4.31 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/G77.html#44328A fix for this issue for SAS Warranty Analysis 4.3 is available at:
http://ftp.sas.com/techsup/download/hotfix/HF2/D64.html#44328| Type: | Problem Note |
| Priority: | high |
| Date Modified: | 2011-11-11 09:27:30 |
| Date Created: | 2011-09-19 08:12:21 |