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The Vienna Development Method (VDM) is one of the longest-established formal methods for the development of computer-based systems. Originating in work done at the IBM Laboratory Vienna [ 1 ] in the 1970s, it has grown to include a group of techniques and tools based on a formal specification language—the VDM Specification Language (VDM-SL).
The VDM formula is derived from the net present value formula and can be used to calculate the value of maintenance. The VDM formula is: PV maintenance = Σ {F SHE,t x (CF AU,t + CF CC,t + CF RA,t + CF SHE,t) / (1+r) t} where: PV maintenance = present value potential of maintenance F SHE,t = SHE factor in year t
The most widely used notations for developing model-based specifications are VDM [1] [2] and Z [3] [4] (pronounced Zed, not Zee). These notations are based on typed set theory. Systems are therefore modelled using sets and relations between sets. Another well-known approach to formal specification is algebraic specification.
Omniscriptum Publishing Group, formerly known as VDM Verlag Dr. Müller, is a German publishing group headquartered in Riga, Latvia. [1] Founded in 2002 in Düsseldorf, [2] its book production is based on print-to-order technology. The company publishes theses, research notes, and dissertations through its e-commerce bookstores. [1]
VDM Metals Group (formerly Vereinigte Deutsche Metallwerke) based in Werdohl, Germany, is a manufacturer of corrosion-resistant, heat-resistant and high-temperature nickel alloys, cobalt and zirconium alloys as well as high-alloyed special stainless steels.
Robust decision-making (RDM) is a particular set of methods and tools developed over the last decade, primarily by researchers associated with the RAND Corporation, designed to support decision-making and policy analysis under conditions of deep uncertainty.
Virtual DOS machines can operate either exclusively through typical software emulation methods (e.g. dynamic recompilation) or can rely on the virtual 8086 mode of the Intel 80386 processor, which allows real mode 8086 software to run in a controlled environment by catching all operations which involve accessing protected hardware and forwarding them to the normal operating system (as exceptions).
Dansk Datamatik Center (DDC) was a Danish software research and development centre that existed from 1979 to 1989. Its main purpose was to demonstrate the value of using modern techniques, especially those involving formal methods, in software design and development.