Availability and Cost Analysis of a Fault-Tolerant Software System with Rejuvenation

2008 ◽  
Author(s):  
Long Zhao ◽  
QinBao Song
Keyword(s):  
Cost Analysis ◽  
Fault Tolerant ◽  
Software System

PERFORMABILITY AND COST ANALYSIS OF DEGRADABLE SYSTEMS

1995 ◽  
Vol 02 (03) ◽  
pp. 291-298 ◽  
Author(s):  
LARS NORDMANN ◽  
HOANG PHAM
Keyword(s):  
Cost Analysis ◽  
System Performance ◽  
Fault Tolerant ◽  
Static Model ◽  
Efficient Procedure ◽  
Optimal System Design ◽  
Fault Tolerant Systems ◽  
Minimum System ◽  
Special Case

Many models and methods have been proposed in the literature to evaluate the reliability of fault-tolerant systems. In this paper, we study systems with one degradation mode. We introduce a static model and present efficient algorithms for the evaluation of the system performance and cost. For the special case of a system consisting of identical units we derive an efficient procedure for the determination of an optimal system design with respect to a minimum system cost.

scholarly journals Goal Programming Approach for Selection of COTS Components in Designing a Fault Tolerant Modular Software System under Consensus Recovery Block Scheme

2014 ◽  
pp. 65-72
Author(s):  
P. C. Jha ◽  
Vikram Bali
Keyword(s):  
Goal Programming ◽  
Software Reliability ◽  
Fault Tolerant ◽  
Random Variable ◽  
Chance Constraint ◽  
Programming Approach ◽  
Software System ◽  
Modular Software ◽  
Goal Programming Model ◽  
Commercial Off The Shelf

The application of computer systems has now crossed many different fields. Systems are becoming more software intensive. The requirements of the customer for a more reliable software led to the fact that software reliability is now an important research area. One method to improve software reliability is by the application of redundancy. A careful use of redundancy may allow the system to tolerate faults generated during software design and coding thus improving software reliability. The fault tolerant software systems are usually developed by integrating COTS (commercial off-the-shelf) software components. This paper is designed to select optimal components for a fault tolerant modular software system so as to maximize the overall reliability of the system with simultaneously minimizing the overall cost. A chance constrained goal programming model has been designed after considering the parameters corresponding to reliability and cost of the components as random variable. The random variable in this case has been considered as value which has known mean and standard deviation. A chance constraint goal programming technique is used to solve the model. The issue of compatibility among different commercial off-the shelf alternatives is also considered in the paper. Numerical illustrations are provided to demonstrate the model.

OPTIMAL COMPONENT SELECTION APPROACH FOR FAULT-TOLERANT SOFTWARE SYSTEM UNDER CRB INCORPORATING BUILD-OR-BUY DECISION

2013 ◽  
Vol 20 (06) ◽  
pp. 1350024 ◽  
Author(s):  
P. C. JHA ◽  
RAMANDEEP KAUR ◽  
SHIVANI BALI ◽  
SUSHILA MADAN
Keyword(s):  
Fault Tolerant ◽  
Quality Standards ◽  
Software System ◽  
Critical Systems ◽  
Component Selection ◽  
Proposed Model ◽  
Selection Approach ◽  
Block Scheme ◽  
Commercial Off The Shelf ◽  
Recovery Block

Application Package Software (APS) has emerged as a ready-to-use solution for the software industry. The software system comprises of a number of components which can be either purchased from the vendor in the form of COTS (Commercial Off-the-Shelf) or can be built in-house. Such a decision is known as Build-or-Buy decision. Under the situations wherein the software has the responsibility of supervising life-critical systems, the inception of errors in software due to inadequate or incomplete testing, is not acceptable. Such life-critical systems enforces upon meeting the quality standards of the software as unforbiddenable. This can be achieved by incorporating a fault-tolerant design that enables a system to continue its intended operation rather than failing completely when some part of the system fails. Moreover, while designing a fault-tolerant system, it must be apprehended that 100% fault tolerance can never be achieved and the closer we try to get to 100%, the more costly the system will be. The proposed model shall incorporate consensus recovery block scheme of fault tolerant techniques. Through this paper, we shall focus on build-or-buy decision for an APS in order to facilitate optimal component selection thereby, maximizing the reliability and minimizing the overall cost and source lines of code of the entire system. Further, since the proposed problem has incompleteness and unreliability of input information such as execution time and cost, hence, the environment in the proposed model is taken as fuzzy.

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