woman in shadow

          The retail problem of slotting refers to the assignment of stock keeping units (SKUs) to the available storage locations in a distribution centre (DC). Generally, the expected total distance travelled by stock pickers during an order consolidation and the resulting level of congestion experienced within aisle racking are common considerations when making these assignments. These criteria give rise to a bi-objective optimisation model with the aim of identifying multiple stock setups that achieve acceptable trade-offs between minimising the criteria on expectation. A mathematical framework is established in this paper, based on these two criteria, for evaluating the effectiveness of a given stock setup. In the framework, a stock picker’s movement between various storage locations is modelled as a Markov chain in order to quantify his or her expected travel distance, while a closed queuing network model is used to devise ...

                                          Daur Ulang Sampah 1.       Definisi Sampah             Sampah merupakan material sisa yang tidak diinginkan setelah berakhirnya suatu proses. Sampah didefinisikan oleh manusia menurut derajat keterpakaiannya, dalam proses-proses alam sebenarnya tidak ada konsep sampah yang ada hanya produk-produk yang dihasilkan setelah dan selama proses alam tersebut berlangsung.             Volume sampah dikota-kota besar didunia saat ini hampir tidak terkendali. Di Indonesia keberadaan sampah plastik masih menjadi momok   bagi Pemerintah dan rakyat Indonesia bahkan dunia. Kementrian Lingkungan Hidup dan Kehutanan (KLHK) bahkan menyebut bahwa jumlah sampah plastik di Indonesia telah mencapai level mengkhawat...