"ballard9" - 1 õppematerjal

Integration of Lean Con. and Building Information Modelling

When managers are trying to avoid the idleness of their crew, equipment, etc., without thinking of consequences, they realize that work with one or more prerequisites missing. This generally has an impact opposite to that expected; i.e., an 39 increase of process time and variability, as well as a decrease in worker motivation due to the fact that workers must invent work for themselves. Ballard9 (2002) also presented a general three flow model, based on the nature of the flows: Directives Prerequisite work Resources "Directives provide guidance according to which output is to be produced or assessed. Examples are assignments, design criteria, and specifications. Prerequisite work is the substrate on which work is done or to which work is added. Examples include materials, whether ,,raw or work-in-process,