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Input/Output Curves
Grasas, Alex; Ribera, JaumeNota técnica PN-424-EServicios y operacionesThis note presents the input/output curves, how to plot them and their meaning. The input/output curves represent the inputs and outputs of the flowchart of any process. They can be used to study different parameters of the process, such as lead times, the average number of elements in the system, etc. These concepts are discussed using an example.Desde 8,20 €
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Project Simulation
Grasas, Alex; Ribera, JaumeNota técnica PN-429-EServicios y operacionesThis note allows the simulation of a PERT-CPM network system, using Montecarlo techniques. It has been limited in scope, and it deals only with Beta or triangular, Normal and Uniform duration probability density functions. The workbook assumes the basic CPM data on activities durations and precedence relations have been entered and saved in a standard MS-Project format. The user is expected to import the data from the corresponding MS-Project fil...Desde 8,20 €
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Inventory Management - Safety Stock
Grasas, Alex; Ribera, JaumeNota técnica PN-428-EServicios y operacionesThis note presents the concept of safety stock as a way of protecting the company against uncertainty in stock behavior. It contains a number of examples and a spreadsheet that calculates the size of the safety stock, taking into account the parameters that affect it. It continues with a discussion of advanced aspects related with safety stocks.Desde 8,20 €
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Queueing
Grasas, Alex; Ribera, JaumeNota técnica PN-427-EServicios y operacionesThis note discuss interference times (and stocks or queues) in situations where there is in fact sufficient capacity to cover the process demands and yet interferences occur due to variations in the arrival rate or in service times. It contains two calculation sheets for the M/M/s and G/G/s models that introduce various measures of efficiency in a queueing system: "hard" or objective measures (such as costumer waiting time) and "soft" or subjecti...Desde 8,20 €
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Inventory Policies. Stock Accounting
Grasas, Alex; Ribera, JaumeNota técnica PN-430-EServicios y operacionesThis note explains stock accounting through a number of policy-based examples (s, S). Stock accounting is understood to mean the logistics of stock changes over time, that is, calculating stock levels at any given moment in time, based on the system's parameters and control policies. It also contains a spreadsheet that calculates the values of s and S following an approximate Ehrhardt method.Desde 8,20 €
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Inventory Management - Batching
Grasas, Alex; Ribera, JaumeNota técnica PN-426-EServicios y operacionesThis note describes the batching method, explores its rationale and explains its effects. Batching is a method commonly used in many operational environments, including manufacturing and services, and consists of grouping several individual items into a single batch so that they can be processed together. Therefore, this note studies the associated costs and determines "optimal" batch sizes.Desde 8,20 €
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Process capacity calculator
Grasas, Alex; Ribera, JaumeNota técnica PN-425-EServicios y operacionesThis note contains the tools for computing the capacity of a process when dealing with a single product, and with multiple products. In order to do so, the different tasks and operations needed for manufacturing a single product and the resources employed in the process have to be taken into account. In the case of multiple products, we also need to keep in mind the preparation time, the product mix and the batches. Data from case number P-634, «...Desde 8,20 €
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Microsoft Project Tm: A brief tutorial (C)
Grasas, Alex; Ribera, JaumeNota técnica PN-423-EServicios y operacionesThis technical note is an introduction to the use of Microsoft Project 2000. Among other things, this project planning software allows the user to organize and schedule project activities, allocate resources and costs, prepare reports, monitor progress, etc. Using examples to aid comprehension, the note explains the most important features of the program, so that once the user has grasped the basics, she can develop and apply her knowledge in pla...Desde 8,20 €
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Microsoft Project Tm: A brief tutorial (A)
Grasas, Alex; Ribera, JaumeNota técnica PN-421-EServicios y operacionesThis technical note is an introduction to the use of Microsoft Project 2000. Among other things, this project planning software allows the user to organize and schedule project activities, allocate resources and costs, prepare reports, monitor progress, etc. Using examples to aid comprehension, the note explains the most important features of the program, so that once the user has grasped the basics, she can develop and apply her knowledge in pla...Desde 8,20 €
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Microsoft Project Tm: A brief tutorial (B)
Grasas, Alex; Ribera, JaumeNota técnica PN-422-EServicios y operacionesThis technical note is an introduction to the use of Microsoft Project 2000. Among numerous other options, this project planning program allows the user to organize and schedule project tasks, assign resources and costs, prepare reports, monitor progress, etc. With the help of illustrative examples, the note explains the most important features of the program, so that once they have been assimilated, the user may develop and apply them in plannin...Desde 8,20 €