Search results for "Operations Research"
showing 10 items of 1297 documents
Affective responses to work process and outcomes in virtual teams
2005
PurposeTo analyze the direct and combined effects of the communication media and time pressure in group work on the affective responses of team members while performing intellective tasksDesign/methodology/approachA laboratory experiment was carried out with 124 subjects working in 31 groups. The task performed by the groups was an intellective one. A 2 × 3 factorial design with three media (face‐to‐face, video‐conference, and e‐mail) and time pressure (with and without time pressure) was used to determine the direct and combined effects of these two variables on group members' satisfaction with the process and with the results, and on members' commitment with the decision.FindingsResults s…
Organizational justice, sickness absence and employee age
2013
Purpose – The aim of this paper is to study age-related differences in how perceptions of two forms of organizational justice, i.e. procedural and interactional justice, are related to short (i.e. non-certified) spells and long (i.e. medically certified) spells of sickness absence. Design/methodology/approach – The authors conducted a study on a large sample of Finnish public sector employees (n=37,324), in which they matched employees' 2004 survey data with their records-based sick absences in 2005 and 2006. Findings – The results suggest that age moderates the association between perceptions of procedural justice and long sickness absences after controlling for gender, tenure, occupationa…
Sensitivity Analysis Of Key Customers And Revenue-Oriented Admission Control And Scheduling Algorithm
2013
Received: 15 January 2013 Abstract Accepted: 2 February 2013 The paper deals with the problem of Quality of Web Service (QoWS) in e-commerce Web servers, i.e. in retail Web stores. It concerns the admission control and scheduling algorithm for a Web server system, which aims at preventing the system from overload to provide high QoWS level and ultimately, to increase Web site’s conversion rate, i.e. to turn more visitors into customers. The sensitivity of the algorithm to changes in its basic parameter values was analyzed by using a simulation-based approach. Special attention was paid to evaluation of the parameter impact on conventional and business-related system performance metrics.
The love of money and work‐related attitudes
2004
This study examines the love of money and work‐related attitudes and identifies four money profiles based on a sample of citizens in the Republic of Macedonia. Achieving Money Worshipers (the highest scores on Factors Success, Motivator, and Budget and the lowest on Evil) had the highest active involvement in work activities. Careless Money Admirers (the lowest score on Factor Budget) had the highest external locus of control, the highest involvement, and lowest success avoidance. Apathetic Money Managers (the lowest scores on Factors Success and Motivator) had the highest internal locus of control and the lowest involvement. Money Repellent Individuals (the highest score on Factor Evil) ha…
Effect of partner–agent model practice on microinsurance client value: Insight from microfinance institutions in Tanzania
2018
In absence of formal microinsurance to protect low-income people against natural and man-made disasters, the partnership between insurance companies and microfinance institutions (MFIs), also known as the Partner–Agent Model (PAM), is gaining global recognition from governments, practitioners, and donors for its potential role to deliver microinsurance. Although the model is still nascent in Tanzania, it has significantly increased microinsurance outreach. However, while the microinsurance landscape has been extensively studied, the effect of PAM practice on mandatory microinsurance client value has not received much attention. Therefore, this study examines how the PAM practice affects mic…
Organizational technology as a mediating variable in centralization‐formalization fit
2012
PurposeWith a view to contributing to a better understanding of the interactions between design dimensions, the authors aim to present a formal model that analyzes the internal fit relationship between centralization and formalization, taking into account organizational technology and the “systems approach”.Design/methodology/approachBased on the study by Zeffane, the authors develop an alternative, formal model that introduces organizational technology and assumes that greater structural control does not necessarily lead to better organizational integration. The model equally considers the possibilities of underfit and overfit.FindingsThe proposed formal model provides a sound rationale on…
The experimental study of the hybrid fixation in ACL reconstruction
2012
Abstract The article is approaching an interesting topic regarding ACL reconstruction using the hamstring tendons (semitendinosus and gracilis) as the graft. The initial graft fixation after ACL reconstruction is mechanical and it must assure the stability of the system until the biologic integration takes place. No fixation system is as strong as the native ACL insertion. Therefore, hibrid fixation like an improvement of simple fixation is a field worth studying. The fixation shown in this article is the Hybrid fixation consisting of direct fixation with interference screw and an extra cortical fixation over a cortical screw.
Fitting random cash management models to data
2019
Abstract Organizations use cash management models to control balances to both avoid overdrafts and obtain a profit from short-term investments. Most management models are based on control bounds which are derived from the assumption of a particular cash flow probability distribution. In this paper, we relax this strong assumption to fit cash management models to data by means of stochastic and linear programming. We also introduce ensembles of random cash management models which are built by randomly selecting a subsequence of the original cash flow data set. We illustrate our approach by means of a real case study showing that a small random sample of data is enough to fit sufficiently goo…
An application of Matlab c on Dimensional Nonlinear Programming
2014
[EN] Nonlinear Programming (NLP) is a widely applicable tool in modeling real life problems applied to business, economics and engineering. Is to maximize or minimize a scalar field whose domain is given as a set of constraints given by equalities and/or inequalities not necessarily linear. In this paper we present a virtual laboratory to study the PNL graphically and numerically in the case of two variables
Determinants of elimination decisions in the activity scheduling process
2016
[EN] This paper presents an analysis on the determinants related to a particular rescheduling decision in the activity-travel scheduling process: elimination decisions, which consist in the non-execution of pre-planned activity-travel episodes. Data used come from an in-depth computer-assisted telephone interview (CATI) follow up survey carried out during the implementation of the first wave of an activity scheduling process panel survey. Open-ended answers related to the reasons associated to changes between pre-planned and executed agenda are studied. First, an interpretative qualitative method based on analytic induction (AI) is used to cope with the complex nature of the rescheduling de…