The field can be perfectly even. If you have 15 guys and 5 girls enter the field, you'll find more men attain the goal. So: “Solve the problem at the left.”†

The field can be perfectly even. If you have 15 guys and 5 girls enter the field, you'll find more men attain the goal. So: “Solve the problem at the left.”† This means for most leverage, meaning best results with least cost and least waste, intervene in a system at the earliest stage that can make a difference. † The metaphor is assuming production lines flow left to right. RTL cultures can say "solve the problem at the right" which has the advantage of both metaphor and pun!