Exm simulation

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1 POLITECNICO DI MILANO “LOGISTICS MANAGEMENT” COURSE A.Y. 2022-23 (Prof. Marco Melacini) EXAM SIMULATION NOVEMBER 15th 2022 Name and surname : _______________________________ ID Number: ERASMUS If necessary, introduce the missing data, justifying the choice of the value E1 E2 E3 Q1 Q2 E1 E2 E3 Q1 Q2 Please mark those exercises/questions you have answered Grades (given by the Professor) Exercise n. 1 MACCHERONI S.p.A. is a pasta manufacturer that wants to build an automated warehouse to store pallet loads (800 x 1,200 x h = 1,500 mm). The warehouse will be made of single deep selective racks, served by one S/R machine per aisle. In every aisle, a pallet location is identified by three values: R/L: right hand side rack/left hand side rack (with respect to the I/O system); PLC: pallet location column (see Figure 1); SL: storage level (see Figure 1). Consider the following design parameters: • storage capacity not lower than 12,000 pallet locations and throughput capacity not lower than 100 pallet loads/h; • maximum rack length equal to 80 m and maximum rack height equal to 22.5 m; • gross dimensions of the bay equal to: Length L = 2.8 m; Depth D = 1.3 m; Height H = 1.7 m; • three pallet locations per bay (see Figure 1); • input/output point at the 3rd storage level; • horizontal speed of the S/R machine equal to 2 m/s and vertical speed of the S/R machine equal to 0.4 m/s; • fixed positioning time equal to 5 s and fixed time for the fork cycle equal to 10 s; • acceleration + deceleration delays equal to 8 s. 1. Assuming that 40% of the cycles are single command cycles and F.E.M. 9851 is applicable, design the storage system satisfying both the storage and throughput capacity constraints; 2. Assume you have to retrieve the pallet load located in Aisle number 1 and…