Hedging and standard - MRP

In standard-MRP packages it is possible to use safety stocknorms. In none of the standard-MRP packages however, it is possible to use hedging as an alternative technique for safety stocknorras, although this technique has several advantages from a theoretical point of view. At Eindhoven University of Technology an attempt is made to incorporate hedging in an existing MRP-package.From the functional design it appeared, that what originally seemed to be a simple addition to the options available in an MRP-package, turned out to have a rather large impact on many of the MRP-modules.<br/

Fout na de oorlog: Fascistische en racistische organisaties in Nederland 1950-1990

Contains fulltext : 3777.pdf (publisher's version ) (Open Access

A state space model for exponential smoothing with group seasonality

We present an approach to improve forecast accuracy by simultaneously forecasting a group of products that exhibit similar seasonal demand patterns. Better seasonality estimates can be made by using information on all products in a group, and using these improved estimates when forecasting at the individual product level. This approach is called the group seasonal indices (GSI) approach, and is a generalization of the classical Holt-Winters procedure. This article describes an underlying state space model for this method and presents simulation results that show when it yields more accurate forecasts than Holt-Winters.Common seasonality; demand forecasting; exponential smoothing; Holt-Winters; state space model.

Een economische beschouwing van het millenniumprobleem

Het millenniumprobleem vormt een serieuze bedreiging voor de maatschappij in het algemeen en de economie in het bijzonder. Door het probleem krachtig aan te pakken, kunnen de risico?s sterk worden teruggebracht, maar helemaal uitbannen is onmogelijk. Het aanpakken van het probleem brengt hoge kosten met zich mee, maar deze dienen te worden afgewogen tegen de schade die op kan treden als het probleem op zijn beloop wordt gelaten en tegen de kosten die dan alsnog gemaakt moeten worden om de ?millennium bug? te redresseren. Het is duidelijk dat het millenniumprobleem de productieprocessen aanzienlijk kan verstoren. Het is echter moeilijk om kansen aan de mogelijke gevolgen toe te kennen. De situatie wordt vooral gekenmerkt door onzekerheid over de gevolgen. Wel dient er op de mogelijke problemen geanticipeerd te worden. Wat er aan aanpak nodig is om de bedrijfsvoering tegen calamiteiten te beschermen, dient ook echt te gebeuren

Economic effects of stimulating business R&D

The main question dealt with in this paper is: what are the economic effects of these financial government incentives? The answer is of particular importance with a view to the question whether the government should intensify, or conversely, cut down on its R&D incentives policy. The economic effects of these R&D incentives are determined by a multitude of factors; factors which also tend to interact. In addition to the spillover effects referred to above, the main decisive factors are: the extent to which the government incentives really do lead to an increase in business R&D, and the direct effects of this extra R&D on business performance. A total of 12 mechanisms are distinguished, all of which have an effect on the economic effects of R&D incentives. These twelve mechanisms are placed in a total framework in this paper. All in all, this paper shows that the economic effects of the government?s stimulation of business R&D are particularly beneficial. The paper also sets out the mechanisms that lead to this result, and which mechanisms are of particular importance in this respect