LOGISTICS ENGINEERING Faculty of Mechanical Engineering, Technical University of Sofia Ha 1. Logistics engineering - an

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Logistics Engineering Faculty Of Mechanical Engineering Technical University Of Sofia Ha 1 Logistics Engineering An 1 (275.83 KiB) Viewed 54 times

Logistics Engineering Faculty Of Mechanical Engineering Technical University Of Sofia Ha 1 Logistics Engineering An 2 (163.88 KiB) Viewed 54 times

LOGISTICS ENGINEERING Faculty of Mechanical Engineering, Technical University of Sofia Ha 1. Logistics engineering - an introduction. Definitions for logistics and supply chain networks. Logistics activities. Multistage logistics process chain. Material and information flows. 2. Materials and unit loads. Material characteristics. Unit load principle. Unitizing, Load units and transport units in the logistics chain. 3. Transportation modes & materials handling equipment. Metrics in logistics engineering. Distances in space and time. 4. Transportation- trans-modal, multimodal and intermodal concepts. 5. Basic flow element. Simple conveyor routes and areas. Performance measures for conveying. Throughput and inter arrival time. 6. Basic flow element. Simple transportation connection. Performance measures for trucks, cranes and fork lifts. Throughput and inter arrival time. 17. Performance measures for stochastic flows. Random variables, Probability density function (pdf) and cumulative distributions function (cdf), expected values and variance. Some important random distributions. 8. Traffic flow. Average speed – types and measuring. Speed-flow-density relationships. Fundamental law of traffic flow. 9 Traffic flow. Intersections with traffic lights. Conservation law for intersections. Average deterministic waiting time. 10. Logistics nodes. Connectivity. Ranking. Decomposition. Basic law of material flows for logistics nodes. Branching nodes. Discrete and partially-continuous branching. Estimation of a partial limiting throughput. Throughput condition. 12. Branching nodes. Partial limiting throughput by continuous branching. Estimation of a switching probability and switching frequency. Throughput limiting condition. 13. Integration node. Dispatching rules. Dispatching with restrained and with absolute priority. Throughput calculations. 14 Models of material flows. Sankey-diagrams and from/to matrices. Graph representation.

15. Calculation of transport distances in networks. Shortest path problem - Dijkstra algorithm Loads and transport flow matrices. Estimation of number of vehicles, required in a logistics network 16. page 1 of 2 Logistics Engineering - conspectus 17. Queueing systems. Characteristics of a queue. Single server and multi servers. Arrival, waiting and service processes. Measures of performance. Queue descriptors - Kendall's notation. 18. Ergodicity condition for single stage queueing systems. Little's Theorem. 19. Basic parameters for queueing systems. Utilization. Internal and external characteristics. Fundamental dependencies. 20. Models with Markov's chains for queueing systems M/M/1 and M/M/s. Derivation of basic parameters. Buffer size sufficiency. 21. Queueing systems with arbitrary distribution of an arrival and/or service time. Influence of the variation coefficients. 22. Logistics chains as multistage queueing models. Parameters of the departure process. Influence of the blocking. 23. Simulation modelling of logistics systems. Random numbers generation. Levels of simulation languages. Universal simulation languages. Specialized simulation environments.