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Simulation Driven Development of distributed systems – coupling of virtual and real system components

Pfitzinger B., Baumann T.

Annals of Computer Science and Information Systems

2018

Vol. 16

93--97

Looking at the end-to-end processing, typical software-intensive systems are built as a system-of-systems where each sub-system specializes according to both the business and technology perspective. One challenge is the integration of all systems into a single system -- crossing technological and organizational boundaries as well as functional domains. To facilitate the successful integration, we apply the system design process Simulation Driven Development (SDD). The basic idea is the application of realistic simulation models in parallel to existing software engineering procedures to enable testing and validation from day one. In this article we discuss the coupling of sub-systems implemented as virtual simulation models with sub-systems implemented as real sub-systems to enable unit tests against system level. Two approaches are presented: loose coupling and tight coupling.

Range of aplication and limitations of the earned value method in construction project estimation

Baumann T., Dziadosz A., Kapliński O., Rejment M.

Czasopismo Techniczne. Budownictwo

2014

R. 111, z. 2-B

65--72

The considerable degree of complexity found in construction work, as well as project susceptibility to unpredictable conditions determines the need of ongoing progress monitoring and continuous time-cost analysis during the execution of work. Financial and material analysis, using the Earned Value method applied to the construction of an Underground Gas Storage Facility, including project risks which occurred during the project, helped to identify the advantages and limitations in application of this method of monitoring work progress.

Znaczny stopień skomplikowania robót budowlanych oraz wrażliwość przedsięwzięć na warunki losowe warunkuje konieczność bieżącej kontroli postępu i permanentnej analizy czasowo-kosztowej w trakcie realizacji. Przeprowadzona w artykule analiza rzeczowo-finansowa, przy wykorzystaniu metody Earned Value budowy Podziemnego Magazynu Gazu, z uwzględnieniem występujących w ramach przedsięwzięcia ryzyk, pozwoliła na wskazanie zalet oraz ograniczeń w stosowaniu wspomnianego sposobu kontroli postępu robót.