Insights Into Beyond-Life Complex Systems Suffering From Obsolescence

Abstract

Supporting and maintaining complex systems in developing countries has numerous challenges, especially in systems that suffer from obsolescence and operate beyond their designed life. Existing methodologies in developing an integrated logistics support system (ILSS) in developed countries are based on resources that are readily available, while in developing countries this is not always the case, and so grounded design rules within a robust framework are required. Various methods and six case studies of high technology systems were used for this paper. Obsolescence effects are considerably wider than the retirement and obsolescence component of present frameworks. OPSOMMING Ondersteuning en instandhouding van komplekse stelsels in ontwikkelende lande het talle uitdagings, veral in stelsels wat verouder en langer as hul ontwerpslewe bedryf word. Bestaande metodologieë vir die ontwikkeling van 'n geïntegreerde logistieke ondersteuningstelsel in ontwikkelde lande berus op hulpbronne wat geredelik beskikbaar is, terwyl dit in ontwikkelende lande nie altyd die geval is nie. Daar word ook grondige ontwerpreëls binne 'n robuuste raamwerk vereis. Gemengde metodes is aangewend en ses gevallestudies van hoëtegnologie stelsels is vir hierdie studie gebruik. Verouderingseffekte is aansienlik wyer as die aftrede-en verouderingskomponent van bestaande raamwerke.

Variations of the Time to Failure (TTF) for Specific Components in Aeronautical Navigation Systems

“…In fact, the observed data do not look like data obtained under normal operating conditions, but are similar to data obtained under burn-in testing or accelerated failure [1][2][3][4][5]. Ironically enough, this observed phenomenon is in direct contradiction with (a) a common practice in many developing countries, wherein attempts are made to maintain and support complex systems that are being operated beyond their designed life [6,7], and (b) the situation where obsolescence is a major concern, such as when dealing with legacy electronic military systems [8,9]. This paper attempts to establish the existence of the aforementioned phenomenon, a preliminary step towards an extensive exploration, hopefully leading to full understanding of it, which might include or lead to:…”