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- Project Planning, Uncertainty Analysis And Critical Chain Management
- Critical Chain Management is a relative new way of handling the variability in project schedules. The clue is to establish a chain of critical activities and chains of non-critical activities. In the chains are connected buffers to take care of uncertainty in the time plan. The management consists in deciding...
- White papers 2007-03-05
- Analysis Of The Bullwhip Effect In Supply Chains
- An important phenomenon in supply chain management, known as the bullwhip effect, suggests that demand variability increases as one moves up a supply chain. This paper examines the influence of different replenishment policies on the occurrence of the bullwhip effect. The paper demonstrates that certain replenishment policies can in themselves...
- White papers 2006-02-20
- States' Control of Prescription Drug Spending: A Heterogeneous Approach
- In an effort to balance Medicaid budgets, states use prescription drug cost containment tools in unique ways and in varying combinations. The paper reports on the variability in state-level strategies to control the cost of prescription drugs and describes broad state-to-state differences in per beneficiary spending on drugs. This heterogeneity...
- White papers 2005-08-01
- The Application Of A Six Sigma Methodology To Military Supply Chain Processes
- This paper explains the findings of an investigation into supply chain process variability in the UK Defence supply chain. The study's objectives were two-fold: to investigate the nature and causes of variability in the Defence supply chain; and to ascertain whether a six sigma methodology could be applied usefully in...
- White papers 2005-06-19
- MoSes Modeller: Industry-Specific Applications, Case Studies and News
- Tillinghast Software Solutions has improved its property and casualty financial modeling tool - the Advanced Financial Model (AFM) - for MoSes version 5. With these changes, the modeler can measure the effect of several additional sources of risk and can capture more of the subtle interactions between them. Some examples...
- White papers 2005-06-01
- Improving the Resolution of Gridded-Hourly Mobile Emissions: Incorporating Spatial Variability and Hangling Missing Data
- To more accurately predict hourly running stabilized link volumes for emissions modeling, a new method was recently developed that disaggregates the period-based model link volumes into hourly volumes using observed traffic count data and multivariate multiple regression (MMR). This paper examines the MMR methodology with clustering and classification analyses to...
- White papers 2005-02-14
- Simultaneous Truth and Performance Level Estimation (STAPLE): An Algorithm for the Validation of Image Segmentation
- Characterizing the performance of image segmentation approaches has been a persistent challenge. Performance analysis is important since segmentation algorithms often have limited accuracy and precision. Interactive drawing of the desired segmentation by human raters has often been the only acceptable approach, and yet suffers from intra-rater and inter-rater variability. Automated...
- White papers 2004-07-01
- Irreversible Investment Under Interest Rate Variability: New Results
- This paper studies the impact of interest rate and revenue variability on the decision to carry out an irreversible investment project. Given the generality of the considered valuation problem, it first provides a thorough mathematical characterization of the problem and develops some new results. Contrary to what previous literature has...
- White papers 2003-12-11
- Investment, Valuation, And Growth Options
- From the executive summary: 'The presence of growth options in the value of firm generates variability in firm value that is not driven by current cash flows. The variability diminishes the correlation between investment, while maintaining a positive correlation between investment and cash flow. The investing planning model suggests that...
- White papers 2003-05-01
- Trade Costs, Market Integration, And Macroeconomic Volatility
- This paper examines the effects of trade costs on macroeconomic volatility. It first constructs a dynamic, two-country general equilibrium model, where the degree of market integration depends directly on trade costs (transport costs, tariffs, etc.). The model is an extension of Obstfeld and Rogoff (1995). Naturally, a reduction in trade...
- White papers 2003-03-01
- Estimating the Natural Rate of Interest: A SVAR Approach
- This article estimates the historical time series of the natural rate of interest using a structural vector autoregressive model. This method returns plausible results and thus seems to be well designed for the estimation of the natural rate of interest. It shows that the natural rate exhibits quite substantial variability...
- White papers 2003-01-10
- Validation of Image Segmentation and Expert Quality With an Expectation-Maximization Algorithm
- Characterizing the performance of image segmentation approaches has been a persistent challenge. Performance analysis is important since segmentation algorithms often have limited accuracy and precision. Interactive drawing of the desired segmentation by domain experts has often been the only acceptable approach, and yet suffers from intra-expert and inter-expert variability. Automated...
- White papers 2002-10-24
- Performance of Motion-Resistant Pulse Oximeters in Tracking Neonatal Heart Rate Variability
- Heart rate variability is routinely assessed in acutely ill neonates. ECG monitors have been the source of this parameter but a robust and responsive pulse oximetry pulse rate could suffice. In the presence of motion and low perfusion, older pulse oximeters can display erroneous pulse rate values. Although the newer...
- White papers 2002-04-25
- Quantifying Simulation Output Variability Using Confidence Intervals and Statistical Process Control
- Two types of variability can occur in model output: variability between replications and variability within each replication. The objective of the model combined with the type of output variability determines which tool is more appropriate for output analysis. Many output analysis techniques are used to translate simulation model results into...
- White papers 2001-11-14
- Enterprise Risk Management
- Enterprise Risk Management (ERM) requires an understanding of the potential sources of variability in future business outcomes, and an ability to take informed business decisions on this basis. Article explains that the quality of business decisions and processes will be enhanced through greater quantitative and analytical rigour and the communication...
- White papers 2001-10-08
- Comparing Probabilistic and Fuzzy Set Approaches for Designing in the Presence of Uncertainty
- Probabilistic models and fuzzy set models describe different aspects of uncertainty. Probabilistic models primarily describe random variability in parameters. In engineering system safety, examples are variability in material properties, geometrical dimensions, or wind loads. In contrast, fuzzy set models of uncertainty primarily describe vagueness, such as vagueness in the definition...
- White papers 2000-08-07
Additional Resources
- Growth Volatility And Equity Market Liberalization
- If there are benefits to international risk sharing, consumption growth variability should decrease following the liberalization of the equity market. In addition, markets with open equity markets should display lower consumption growth variability than closed markets, everything else equal. However, the recent literature on financial liberalization suggests that volatile capital...
- White papers 2002-08-07
- Modeling Adaptive and Evolvable Software Product Lines Using the Variation Point Model
- It is important to understand the different approaches to modeling variability and building a product line. This paper has described four different approaches to modeling variability, using parameterization, using information hiding, using inheritance, and using variation points. It is also possible to combine these approaches, for example parameterization could be...
- White papers 2003-12-08
- Assessment of Pulse Rate Variability by the Method of Pulse Frequency Demodulation
- Due to its easy applicability, pulse wave has been proposed as a surrogate of electrocardiogram (ECG) for the analysis of heart rate variability (HRV). However, its smoother waveform precludes accurate measurement of pulse-to-pulse interval by fiducial-point algorithms. This paper reports a pulse frequency demodulation (PFDM) technique as a method for...
- White papers 2005-11-01
- Empirical Investigations of Inflation Targeting
- This paper empirically investigates issues associated with inflation targeting using a dataset of 66 countries for the 1980 - 2000 periods. The paper focuses on two issues. First, which factors are systematically associated with a country's decision to adopt inflation targeting as its monetary framework? Second, does inflation targeting improve...
- White papers 2003-07-01
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