Safety Early Warning Research for Highway Construction Based on Case-Based Reasoning and Variable Fuzzy Sets

Table 4

Investment cost risk calculations for Contract F 10,000 Yuan.

Time	Number of project changes this month	Investment cost deviation value (accumulated Change)	Earned value	Investment cost deviation rate	Progress deviation rate
2003.2		−1,614.1201	7,605.669	−0.2122	−0.1856
2003.3	−140	−1,754.1201	8,463.625	−0.2073	−0.2050
2003.4	0	−1,754.1201	8,993.87	−0.1950	−0.2050
2003.5	100	−1,654.1201	9,474.723	−0.1746	−0.1911
2003.6	366.6441	−1,287.476	9,317.278	−0.1382	−0.1427
2003.7	200	−1,087.476	9,306.476	−0.1169	−0.1179
2003.8	0	−1,087.476	9,698.879	−0.1121	−0.1179
2003.9	−80	−1,167.476	9,942.413	−0.1174	−0.1277