Through the analysis of PTU and audit data, the problem of steel ring scratch has a downward trend, but the effect is not obvious. The main problems of temporary measures are as follows: the incoming steel rings are still scratched (from 100% to 0); the edge pressing scratched paint repair is not in place (from 100% to 60%), the logistics transportation sequence improvement is completed (from 10% to 38%), and the rear tail paint repair is not in place (from 80% to 0); the main problems of permanent measures are: the edge pressing tooling and the automatic on-line scheme promote the improvement according to the plan<br>
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