network analysis

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Fig. 59 Network analysis. Network for constructing kitchen extension. (w = weeks).

network analysis or programme evaluation and review technique (PERT)

a method of planning, scheduling and controlling projects involving interrelated but distinct elements of work, or activities. Activities and their interrelationships are depicted in a network of arrowed links representing activities. For example, Fig. 59 shows a simple schematic network for the construction of a kitchen extension, with planned activities and their estimated duration in weeks. Certain activities (like preparing the ground) have to be performed before the next stage of production can be embarked upon (like constructing the shell of the building). The sequential path which takes the least time to complete the project is called the ‘critical path’ (here the route a-b-c-d-e-f, taking 20 weeks) and any delay to these critical activities will delay the project completion. Other activities (like preparing the ground) are non-critical and can be delayed (in this case by up to one week) without delaying the overall project. Such non-critical activities embody an amount of slack time (one week in the example). The total amount of slack time for all non-critical activities shows the extent to which these activities can be delayed before affecting the project completion date.

Network analysis is often applied to large-scale projects in civil engineering and shipbuilding or to major repair or maintenance projects or new product launches. It is used to identify problem areas where bottlenecks may occur and where additional resources may be needed.

References in periodicals archive ?
By contextualizing the information with temporal data that indicates points in time people could have exchanged information, that form of link analysis can demonstrate the likelihood of insider trading.
Link analysis. Link analysis involves determining who is talking to whom, about what, and when.
The UIF has no access to intelligence or judicial databases to cross-check information or conduct link analysis, and also lacks human and technical resources to analyze STRs.
To aid this effort, investigators employ link analysis software that reveals connections and the development of relationships over time.
'Through link analysis and information from the community, we have built up a case against 'Tolits' that led to his arrest and two other members of the local drug group,' Armamento said.
From backlink analysis to link profiles and link building, many commercial tools are now available for the professional search engine marketer to use for in-depth link analysis. Prices for these specialized tools can range from $20/month to $600/month or more, rivaling the annual costs for many library databases.
In addition, insurers should consider network link analysis technology, which analyzes all historical claims to quickly discover organized fraud rings that might otherwise take months or years to identify and prevent.
A March 2016 (http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160AB1872) procurement bill from the University of California, Merced, shows the state allocated $15,000 for "one Cellebrite system," though it's not clear if that system is a UFED Ultimate, a UFED Link Analysis or another product.
"Guarded Exchange software allows corrections and law enforcement to interface with information residing in databases to provide a comprehensive social link analysis, and uses live Investigative Analysts to monitor offender calls," said Steve Schneider and Steve Dean, co-owners of Guarded Exchange.
To enhance the review process, techniques such as link analysis can help identify common characteristics among third parties--for example, interactions with the same government officials.
* Human intelligence tools such as link analysis charts, time and pattern wheel analysis, association matrices, and crime maps.
The analysis and applied research on Web page links started rather late in China and currently focus on link analysis algorithms [1,2,3,4,5] and link analysis applications [6,7,8,9].