Building software : a practitioner's guide by Nikhilesh Krishnamurthy; Amitabh Saran PDF

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By Nikhilesh Krishnamurthy; Amitabh Saran

ISBN-10: 0849373034

ISBN-13: 9780849373039

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They assume that the other guy or the manager will ultimately spot it. Critical problems can easily be missed this way. fm Page 16 Thursday, July 5, 2007 10:24 AM 16 Ⅲ Building Software: A Practitioner’s Guide Ⅲ Consider all critical components in a system. Ⅲ If a component has more than one mode of operation, each of these should be considered individually. Ⅲ Estimate the probability of failure based on: Ⅲ Historical data for similar components in similar conditions Ⅲ QA bugs analysis Ⅲ Experience of one’s earlier projects Ⅲ Documentation by industry experts in their usage scenarios Ⅲ Remember that failures in a particular operation can take a number of forms.

Execution Failures: Overruns under Pressure Often, software does not even reach a stage where it is put in front of users; the project fails before the software is released. The causes of such failures are usually time, resource, or scope overruns. Many times, project managers and architects are not 100-percent aware of the domain’s complexity or the new technologies that would be used for the proposed system. Such failures are common in porting projects (see Chapter 11 on migration) where managers tend to estimate project costs on the basis of the origin and destination technologies without looking into the details of the features used.

Furthermore, at what level of detailed information should exceptions be detected, and how frequently should they be detected and transmitted? There are various tools and methodologies that organizations can deploy to identify exceptions. Types of Systems Systems can be classified in many ways. Those who build software should understand some of those types, including the following. Open systems are those influenced by stimuli outside their known boundaries. A closed system, on the other hand, is one that can function by itself and is not influenced by external stimuli.

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Building software : a practitioner's guide by Nikhilesh Krishnamurthy; Amitabh Saran

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