Date registered: Mar 2007
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
A few reasons:
1. It would require far more work from participants, and it's hard enough to get people to put in the time currently required
2. Few people are going to admit to not doing the required maintenance. They'd either claim to have done it or, more likely, just not participate
3. People who take part in the research are interested in reliability and are responsible enough to consistently respond to the surveys. Responsible people interested in reliability likely do at least the required maintenance.
4. Most things that break are not things that can be maintained: power window motors, audio systems, alternators, and so forth. And of the items subject to maintenance, only some will be caused by lack of maintenance. Ultimately, a very small percentage of repairs will be due to insufficient maintenance.
5. If need be, I can follow up in cases of major failures to find out if they might have been caused by insufficient maintenance. I don't have plans to do this, but it's a possibility, and would be a much more efficient use of people's time than having everyone report all their maintenance. #2 will still apply, but it will apply regardless.
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