With my previous bike I followed the general recommandation for maintainance of drivetrain.
This usually goes like the following: replace chain every 3K Kms, replace rear cassette every 6K Kms and after 22K Kms I replaced the chainring as it started to show shark fin teeth.
I am asking what is the most effective method to maintain the drivetrain, does the above procedure which involes quite a bit of money and labor ( not to mention that I have to get my hands dirty with grease in the process ) or simply use the drivetrain until starts malfunction at which point simply replace all the parts: chain, cassette and chainrings?
Supposing that first sign of malfunction would appear after 11K kms ( half of what I got with previous method ), I could replace the wholedrive train and get another 11Kms at lower cost, not to mention that I don't have to get my hands dirty and I do the procedure only once compared to seven times.
Would the approach work? If so, why do get other recommandations in media, books, etc?
I feel that one can answer the question if we could somehow look at a chart that plots the performance of the drivetrain compared to the distance used. As some suggested performance would include power transfer efficiency, probability of hazards, noise, shifting, etc.
As I see it chain skipping has a high probability of hazards as it could fall of and cause the rider to crash, so that would score something like 9 out of 10 for probability of hazards while a new chain would still score something like 1 out of 10 ( there are chains that brake brand new ).