Critical systems development

... Slide 1Critical systems development Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 20 Slide 2Objectives To explain how fault tolerance and faultavoidance contribute to the development ... Chapter 20 Slide 7Diversity and redundancy examples Redundancy. Where availability is critical( e.g. in e-commerce systems) , companiesnormally keep backup servers and switch to...

Ngày tải lên: 14/09/2012, 11:27

... identification Identify the risks faced by the critical system. In safety -critical systems, the risks are the hazardsthat can lead to accidents. In security -critical systems, the risks are thepotential ... 9 Slide 5Risk-driven specification Critical systems specification should be risk-driven. This approach has been widely used insafety and security -critical systems. ...

Ngày tải lên: 14/09/2012, 11:26

... Primary safety -critical systems Embedded software systems whose failure can cause theassociated hardware to fail and directly threaten people. Secondary safety -critical systems Systems whose ... in other systemswhich can threaten people Discussion here focuses on primary safety-criticalsystems• Secondary safety -critical systems can only be consideredon a one-off basisSafet...

Ngày tải lên: 14/09/2012, 11:26

... Slide 4Validation of critical systems The verification and validation costs for criticalsystems involves additional validation processesand analysis than for non -critical systems: • The costs ... validation costs for critical systems areusually significantly higher than for non -critical systems.  Normally, V & V costs take up more than50% of the total system development...

Ngày tải lên: 14/09/2012, 11:41

... observational study of the relationship of critical illness associated hyperglycaemia in medical ICU patients and subsequent development of type 2 diabetes Critical Care 2010, 14:R130 ... Gašparović1AbstractIntroduction: Critical illness is commonly complicated by hyperglycaemia caused by mediators of stress and inflammation. Severity of disease is the main risk factor for develop...

Ngày tải lên: 25/10/2012, 10:02

... classification of the East Africa Zebu cattle 6 2.3. Cattle Production Systems in Sub-Saharan Africa 10 xi 2.3.1. Traditional production systems 10 2.3.2. Improved production system 12 2.4. Economic ... milk production 26 2.6.4. Intensive Dairy Farming 27 2.7. Cattle fattening systems in Ethiopia 27 2.7.1. Traditional systems 27 2.7.2. By-product-Based fattening 28 2.7.3....

Ngày tải lên: 08/03/2014, 23:20

... mounting other filesystems. The scripts have a fixed order in which they must execute because some of the later scripts are dependant on earlier ones. For example, network filesystems cannot be ... with Windows systems by configuring Samba These are just a few of the available functions. Webmin lets you configure almost all of the com- mon services and popular servers on UNIX systems usin...

Ngày tải lên: 08/03/2014, 23:20

... Abstract. This paper looks at the development of the financial systems of ASEAN-5 countries and Vietnam. By making a comparison between factors that foster the financial development of ASEAN-5 and ... economics fundamentals and financial sector development (1) . ______ (1) Financial development can be defined in several ways. In fact, financial systems can develop in terms...

Ngày tải lên: 14/03/2014, 17:20

... most frequently asked questions about the food hub concept and its role in regional food systems development. What Is a Regional Food Hub? With the growing interest in regional food hubs, ... There are three primary reasons why this lack of infrastructure sties the development of regionally based food systems: Limited Market Options and Revenue Opportunities Although many sm...

Ngày tải lên: 23/03/2014, 08:21