Due to its economic impact “maintainability” is broadly accepted as an important quality attribute of software systems. But in contrast to attributes such as performance and correctness, there is no common understanding of what maintainability actually is, how it can be achieved, measured, or assessed. In fact, every software organization of significant size seems to have its own definition of ...

During maintenance, software systems undergo continuous correction and enhancement activities due to emerging faults, changing environments, evolving requirements, making this phase expensive time-consuming, often exceeding the initial development costs. To understand manage under maintenance better, several maintainability measures have been proposed. The Maintainability Index is commonly used...

Maintainability of mechanical systems based on tribology is suggested and evaluated in this paper. Tribo-features of mechanical systems, which characterise maintainability are identified and are modelled in terms of tribo-maintainability digraph. The nodes in the digraph represent the tribo-features and edges represent the degree of influence among the features. A matrix, one to one representat...

............................................................................................................................................................................ iii

Complex systemmaintainability verification is always a challenging problem due to limited sample sizes. Consequently, conducting maintenance experiments in a laboratory environment is an appropriate way to obtain data for maintainability verification. In maintenance experiments, faults are seeded in the equipment and maintenance activities are implemented to record repair time. In this process,...

In this paper we suggest a scenario-based approach to analyzing non-functional properties of ASM ground models. It is based on well-founded evaluation methods from the software architecture field and enables a designer to reason about the quality features of his model, like e. g. maintainability or testability. A set of scenarios that represent a system’s non-functional requirements and the eva...

earth pressure balance tunnel boring machines (epb-tbms) are favorably applied in urban tunneling projects. despite their numerous advantages, considerable delays and high maintenance cost are the main disadvantages these machines suffer from. reliability, availability, and maintainability (ram) analysis is a practical technique that uses failure and repair dataset obtained over a reasonable ti...