A Two-Stage Modeling and Solution Framework for Multisite Midterm Planning under Demand Uncertainty

2000 ◽  
Vol 39 (10) ◽  
pp. 3799-3813 ◽  
Author(s):  
Anshuman Gupta ◽  
Costas D. Maranas
Keyword(s):  
Demand Uncertainty ◽  
Two Stage ◽  
Stage Modeling

scholarly journals An empirical example of analysis using a two-stage modeling approach: within-subject association of outdoor context and physical activity predicts future daily physical activity levels

2020 ◽  
Author(s):  
Chih-Hsiang Yang ◽  
Jaclyn P Maher ◽  
Aditya Ponnada ◽  
Eldin Dzubur ◽  
Rachel Nordgren ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vigorous Physical Activity ◽  
Wearable Sensors ◽  
Activity Levels ◽  
Two Stage ◽  
Modeling Approach ◽  
Source Program ◽  
Modeling Strategy ◽  
Stage Modeling

Abstract People differ from each other to the extent to which momentary factors, such as context, mood, and cognitions, influence momentary health behaviors. However, statistical models to date are limited in their ability to test whether the association between two momentary variables (i.e., subject-level slopes) predicts a subject-level outcome. This study demonstrates a novel two-stage statistical modeling strategy that is capable of testing whether subject-level slopes between two momentary variables predict subject-level outcomes. An empirical case study application is presented to examine whether there are differences in momentary moderate-to-vigorous physical activity (MVPA) levels between the outdoor and indoor context in adults and whether these momentary differences predict mean daily MVPA levels 6 months later. One hundred and eight adults from a multiwave longitudinal study provided 4 days of ecological momentary assessment (during baseline) and accelerometry data (both at baseline and 6 month follow-up). Multilevel data were analyzed using an open-source program (MixWILD) to test whether momentary strength between outdoor context and MVPA during baseline was associated with average daily MVPA levels measured 6 months later. During baseline, momentary MVPA levels were higher in outdoor contexts as compared to indoor contexts (b = 0.07, p < .001). Participants who had more momentary MVPA when outdoors (vs. indoors) during baseline (i.e., a greater subject-level slope) had higher daily MVPA at the 6 month follow-up (b = 0.09, p < .05). This empirical example shows that the subject-level momentary association between specific context (i.e., outdoors) and health behavior (i.e., physical activity) may contribute to overall engagement in that behavior in the future. The demonstrated two-stage modeling approach has extensive applications in behavioral medicine to analyze intensive longitudinal data collected from wearable sensors and mobile devices.

Service capacity coordination in IT services supply chain

2018 ◽  
Vol 13 (4) ◽  
pp. 952-972 ◽  
Author(s):  
Sanjay Kumar Prasad ◽  
Ravi Shankar
Keyword(s):  
Supply Chain ◽  
Demand Uncertainty ◽  
Degree Of Substitution ◽  
Future Research ◽  
It Services ◽  
Two Stage ◽  
Content Type ◽  
Optimal Capacity ◽  
Automated Software ◽  
Capacity Cost

Purpose The purpose of this paper is to investigate capacity coordination in services supply chain (SSC). It provides discussion and application of various contracts in a two-stage single period SSC. Design/methodology/approach This paper considers a two-stage serial supply chain with demand uncertainty and price insensitivity. A model is developed to represent a global IT SSC incorporating services specific factors like over-capacity cost and higher degree of substitution resulting in flexibility to meet unplanned demand. At first, centralized and competitive solutions of the model are studied. Then, the paper studies coordination in this supply chain using some of widely used contract templates. Findings This paper finds several key insights for the researchers and practitioners in this area around adverse impact of over-capacity cost on demand, positive effect of delivery team’s exposure to market on contracting terms and better understanding of efficient frontiers for selected contracting mechanism. Research limitations/implications This paper has limited its analysis to three key and most widely used contracts and made assumptions about risk-neutrality of the firms. Future research can study other contracting templates and/or relax for the model as laid out in this paper. Practical implications An automated software agent can be built leveraging the closed form equations developed here to help decide on optimal capacity investment and devise coordinating contracts. Originality/value This paper established that because of higher degree of substitution, perishability and non-trivial over-capacity cost, SSC behave bit differently than the physical goods supply chain and coordination of participating firms needs to be studied in a services specific context for improving system-wide performance.

Investigation and two-stage modeling of sintering behavior of nano/micro-bimodal powders

2019 ◽  
Vol 352 ◽  
pp. 42-52 ◽  
Author(s):  
Joo Won Oh ◽  
Yujin Seong ◽  
Da Seul Shin ◽  
Seong Jin Park
Keyword(s):  
Sintering Behavior ◽  
Two Stage ◽  
Stage Modeling

Simulating the economic viability of crawfish production: A two‐stage modeling approach

2001 ◽  
Vol 5 (1-2) ◽  
pp. 69-79 ◽  
Author(s):  
Amy McCullough ◽  
Conrado M. Gempesaw ◽  
William H. Daniels ◽  
J. Richard Bacon
Keyword(s):  
Economic Viability ◽  
Two Stage ◽  
Modeling Approach ◽  
Stage Modeling
Sign in / Sign up

Export Citation Format

Share Document