According to recent Cutter research, only 14% of companies reported good software schedule and budgetestimation performance.
按照最近的Cutter的研究,只有14%的公司报告它们的软件日程表和预算评估比较好1。
3
Error budgetestimation about conventional centering method shows that it cannot be used to control the vertex off-centering error, so interferometric method was suggested.