Bi-Level Programming Model of Cloud Manufacturing Services Based on Extension Theory

Table 2

The attribute values of and the requirements of QoS.

The attribute values of				the requirements of QoS
	a1	a2	a3	c1	c2	c3	c4	c5
d1	Poor	Easy	25	Good	Common	Common	[10, 14]	2.5
d2	Good	Hard	15	Good	Common	Good	[6, 10]	3.2
d3	Common	Common	20	Good	Good	Good	[8, 12]	3.0
d4	Good	Very hard	10	Good	Good	Very Good	[4, 8]	3.5