Cost Control Method and Software in Bidding Process Based on Gray System Forecast

Table 3

Result of accuracy test.

Project number	1	2	3	4
Cost of each work day (𝑋^(0))	150	130	130	140
Gray forecast cost (𝑋^(0))	150	128.3	131.3	138.4
𝑒(𝑖)	0	1.7	−1.3	1.6

Unit: yuan.