Deborah J. Medeiros

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The Extend simulation environment provides an integrated structure for building simulation models and developing new simulation tools. This environment supports simulation modelers on a wide range of levels. Model builders can use Extend’s pre-built modeling components to quickly build and analyze systems without programming. Simulation tool developers can(More)
This paper presents a case study application of a cancer treatment center facility. A simulation model was created and integrated to a multi-objective optimization heuristic developed by the authors with the purpose of finding the best combination of control variables that optimize the performance of four different objectives related to the system. The(More)
In this paper we discuss verification and validation of simulation models. The different approaches to deciding model validity are described, two different paradigms that relate verification and validation to the model development process are presented, the use of graphical data statistical references for operational validity is discussed, and a recommended(More)
Healthcare management operates in an environment of aggressive pricing, tough competition, and rapidly changing guidelines. Computer simulation models are increasingly used by large healthcare institutions to meet these challenges. However, small healthcare facilities serving the poor are equally in need of meeting these challenges but lack the finances and(More)
Over the years, simulation models have been successfully built to observe the behavior of systems. Despite advances in the field and its growth in popularity, when simulation is to be introduced to an organization, there are challenges to be met including acceptance by staff, availability of staff to describe the various operations, existence of useful(More)
Inbound call center operations are challenging to manage, in large part because there is considerable uncertainty in estimates of arrival rates, which vary over time. We have developed a general purpose simulation model for inbound call center operations which supports time varying and uncertain arrival rates along with variable staffing. We outline the(More)
Air traffic delay is a growing and expensive problem. We investigated ways to reduce the cost and magnitude of such delays by trading gate delays against more expensive air delays. Air management and planning at this level can be facilitated by simulation, especially for strategies that alter controls on the system. We used the SIMMOD air traffic simulation(More)
An important goal in scheduling products through a manufacturing facility is to assure that the work is completed as close as possible to its due date. Work that is late creates downstream delays, while early completion can be detrimental if storage space is limited. This paper reports initial results in developing a scheduling procedure for an automated(More)
This panel session is based on the responses of simulationists representing various segments of simulation practice, to an article on the required skills of a simulation analyst. The perspectives represented are those of academia, government, industry, military, and research. First, the essence of the reference article is provided. Then, the five(More)
A miniload is an automated storage and retrieval system which stores small parts in bins or totes. The system consists of racks with a central aisle along which a computer controlled stacker crane travels to store and retrieve the bins. These systems are typically used in order picking applications, or in manufacturing support for the storage of tools and(More)