Table 2: Impact of different demand variabilities on the supply chain.

Models Contract parameters( , ) Total

Decentralized model under traditional arrangement ( , ) (18.40, 20.52)(100, 40)37.6387.411.65135.49402.17358.24895.90
(100, 45)29.5298.701.6597.72454.14281.05832.91
(100, 50)21.22110.211.6561.56507.10202.06770.71
(18.84, 20.86)(100, 40)36.7385.761.65106.70405.76362.17874.62
(100, 45)28.5096.861.6569.62458.29281.03808.94
(100, 50)20.07108.201.6534.17511.90197.91743.99
(19.28, 21.20)(100, 40)35.7984.131.6578.53408.99365.10852.61
(100, 45)27.4395.041.6542.22462.05279.84784.10
(100, 50)18.87106.201.657.56516.30192.46716.32

Coordination under the combined contract ( , , , ) (18.40, 20.52, 17.0, 240)(100, 40)63.64117.351.00348.63459.98365.851174.45
(100, 45)58.99131.861.00336.06488.69321.631146.38
(100, 50)54.29146.271.00323.71518.59276.851119.15
(18.84, 20.86, 17.5, 250)(100, 40)63.64117.351.00319.13477.84377.481174.45
(100, 45)58.99131.861.00307.12507.57331.691146.38
(100, 50)54.29146.271.00295.31538.54285.311119.15
(19.28, 21.20, 18, 260)(100, 40)63.64117.351.00289.64495.69389.121174.45
(100, 45)58.99131.861.00278.18526.45341.751146.38
(100, 50)54.29146.271.00266.90558.48293.771119.15