More elaborate forecasting systems might recognize peculiar problems associated with work on particular items and modify these simple proportionalcost estimates.
一些更为准确的方法可以反应出某项详细工作中与劳动有关的特别问题，并恰当调整成本预测的比例。
2
And since allocation cost is proportional to allocation volume the allocation cost is now higher.
由于分配的代价和分配的大小成比例，分配的代价就变高了。
3
The cost is directly and exponentially proportional (due to the compounding of decisions) to the uncertainty built into each individual decision.