帮忙翻译成英文 “此问题一直存在，以前的措施主要是合理布局生产线减少员工犯错”

Answer 1

This problem has always existed, the major measures arereasonable layout of a production line to reduce the staff.

Answer 2

This problem has always existed, the measures used in past were
primarily a reasonable design of production lines to minimize the
mistakes of the workers.

Answer 3

The problem always remains and the previous solution was appropriate layout of production line to reduce error of the employees.

Answer 4

This problem has always existed, previous measures are mainly rational distribution of production lines to reduce employee mistakes.