子系統再利用層級的軟體發展之研究

Abstract

通常軟體公司會開發一系列的產品，而且在開發這些軟體時會採用相似的架構。因為這樣做可以透過再利用（reuse）減少成本。只要架構差不多的話，不止小元件（component）可以再利用，有時候甚至可以再利用整個子系統（subsystem），節省許多成本。 過去許多文獻大多在探討元件層級的再利用，比較少探討整個子系統的可再利用。因為子系統牽扯到的需求（requirements）相當多，而且再利用時只要其中任何一個部分超過原本支援的部分，就會發生問題。 本論文將用一些案例來研究子系統層級的再利用技術。探討如何增進比較大的元件、甚至是整個子系統的的可再利用性。

Usually, when software companies develop a series of products, they use similar architecture to develop these products because the cost can be reduced by reusing code. If the architecture of these products are similar, they can reuse not only small components, but they may also reuse the whole subsystem or partially. This will reduce more cost. Most papers in the past discussed about reuse in the component level, not in the subsystem level or above. This is because subsystems usually are involved in a lot of requirements. If some of the requirements are not supported, we usually can not reuse the subsystem, and need some modification. This thesis will show some case study and discuss about how to increase reusability in the subsystem level or above.