M/M/1 Retrial Queue with Working Vacation Interruption and Feedback under N-Policy

Table 1

The parabolic method in searching for the optimum solution.

Number of iterations	𝜂0	𝜂1	𝜂2	𝑓(𝜂0)	𝑓(𝜂1)	𝑓(𝜂2)	𝜂	𝑓(𝜂)	Tolerance
0	0.400000	0.600000	0.800000	71.882122	71.623400	71.973607	0.700000	71.741964	0.100000
1	0.400000	0.600000	0.700000	71.882122	71.623400	71.741964	0.578266	71.615748	0.021734
2	0.400000	0.578266	0.600000	71.882122	71.615748	71.623400	0.570064	71.614752	0.008202
3	0.400000	0.570064	0.578266	71.882122	71.614752	71.615748	0.567778	71.614666	0.002287
4	0.400000	0.567778	0.570064	71.882122	71.614666	71.614752	0.566941	71.614655	8.367041×10^−4
5	0.400000	0.566941	0.567778	71.882122	71.614655	71.614666	0.566689	71.614654	2.521251×10^−4
6	0.400000	0.566689	0.566941	71.882122	71.614654	71.614655	0.566601	71.614654	8.826668×10^−5