A negative variance indicates that you ' re behind schedule or over budget , and you need to take action 负差异表示您落后于日程或花费超出预算,此时您必须采取行动。
Positive variances might enable you to reallocate money and resources from tasks or projects with positive variances to tasks or projects with negative variances 如果是正差异,那么您可以将出现正差异的任务或项目中的钱和资源重新分配给出现负差异的任务或项目。