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Assumptions / Promises - Shifting the Paradigm in Systems-Engineering

机译:假设/承诺-改变系统工程范式

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In the field of embedded systems, the need for increased competitiveness necessitates the shortening of the development lifecycle. Engineering activities, that in the past were conducted serially, must often proceed in parallel in order to reduce time-to-market. This causes the concurrently working design-teams, to rely on preliminary information that has not yet been finalized. As a result, substantial rework is required throughout the development process, consuming as much as 50% of the total engineering effort.rnThis paper describes early results from the European Commission supported SPEEDS (Speculative and Exploratory Design in Systems Engineering) project. The objective of SPEEDS is to construct theory and tools for concurrent system development which will reduce the overall systems development cost and time to market.rnWe propose a shift in systems development paradigm, relying on the formal use of contracts composed of Assumptions and Promises (A/P), analogous to Bertrand Meyer's "design-by-contract" model proposed in the early 90's. Such assumptions and promises may be related to both technical and management domains, where contracts are defined at all levels of design abstraction. Horizontal A/Ps analysis (Consistency) and vertical A/P analysis (Composability) may be conducted, leading to early discovery and correction of technical or management incompatibilities emanating from invalid assumptions.rnSPEEDS utilize several enhanced COTS modeling tools, giving users the ability to apply design-by-contract to Model Driven Systems-Engineering in all phases of the development lifecycle.
机译:在嵌入式系统领域,要提高竞争力,就必须缩短开发生命周期。过去是连续进行的工程活动,通常必须并行进行,以缩短产品上市时间。这导致同时工作的设计团队依靠尚未最终确定的初步信息。结果,在整个开发过程中需要进行大量的返工,消耗了总工程量的50%。rn本文介绍了欧洲委员会支持的SPEEDS(系统工程中的推测性和探索性设计)项目的早期结果。 SPEEDS的目标是构建用于并发系统开发的理论和工具,以减少总体系统开发成本并缩短产品上市时间。我们建议系统开发范式的转变,要依靠由假设和承诺组成的合同的正式使用(A / P),类似于Bertrand Meyer在90年代初提出的“按合同设计”模型。这样的假设和承诺可能与技术和管理领域有关,在这些领域中,合同是在设计抽象的所有级别上定义的。可能会进行水平A / P分析(一致性)和垂直A / P分析(可组合性),从而导致早期发现和纠正因无效假设而产生的技术或管理不兼容性。rnSPEEDS利用多种增强的COTS建模工具,使用户能够在开发生命周期的所有阶段将按合同设计应用于模型驱动系统工程。

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