• InfoWorks WS Pro

Introducing critical link analysis

Describe how InfoWorks WS Pro’s critical link analysis allows automated testing and reporting of a selection of links.


00:03

The critical link analysis, or CLA, run type in InfoWorks WS Pro

00:08

allows automated testing and reporting of the effects of failure on a selection of links.

00:13

The selection of links and time of outage is user-specified.

00:17

Failure counts are then reported for each pipe;

00:20

these can be number of properties, connections, nodes, or customer point.

00:25

The criticality grade and criticality count can be updated within the network.

00:30

CLA exercises are important in aiding resilience and determining where to target investment

00:35

as to the number of customers affected if each pipe had to be isolated to fix a burst.

00:40

Additionally, CLA results can give justification for strategic and expensive mains rehab schemes,

00:46

and it can highlight areas where parallel pipes would be necessary instead of one large pipe or abandoning and rationalizing pipe work.

00:54

A simulation is run either for each selected link, or for each isolation area in the selection, in turn.

01:01

When running simulations for isolation areas, the selected link is checked for Isolation Area codes.

01:08

For each Isolation Area code that is found, a simulation is run, and all links with the same code are closed at the same time.

01:16

This is regardless of whether the link is present in the selection.

01:21

Network nodes are tested against user-defined Level of Service Criteria.

01:26

By default, simulation results will be saved for each case

01:29

in which link failure results in failure of nodes in the network to meet the Level of Service Criteria.

01:36

The results can be viewed as Full Play results on the GeoPlan and as a Service Level Report.

01:42

The saved results can then be used to update the criticality fields of network pipes.

01:46

The criticality grade and criticality count values for the affected pipes provide an indication of the significance of the effect on the network,

01:54

should any of the links fail.

01:56

Alternatively, the criticality fields of each link being analyzed can be updated at the end of the simulation for that link,

02:03

and the simulation results can be discarded.

02:06

This option is useful when running Critical Link Analysis on many pipes, as problems due to limited storage for results files are eliminated.

02:15

To use this option, in the Critical Link Analysis Options dialog, check the box for Update Criticality Only.

02:22

But be aware that this option can only be used with a checked-out network.

Video transcript

00:03

The critical link analysis, or CLA, run type in InfoWorks WS Pro

00:08

allows automated testing and reporting of the effects of failure on a selection of links.

00:13

The selection of links and time of outage is user-specified.

00:17

Failure counts are then reported for each pipe;

00:20

these can be number of properties, connections, nodes, or customer point.

00:25

The criticality grade and criticality count can be updated within the network.

00:30

CLA exercises are important in aiding resilience and determining where to target investment

00:35

as to the number of customers affected if each pipe had to be isolated to fix a burst.

00:40

Additionally, CLA results can give justification for strategic and expensive mains rehab schemes,

00:46

and it can highlight areas where parallel pipes would be necessary instead of one large pipe or abandoning and rationalizing pipe work.

00:54

A simulation is run either for each selected link, or for each isolation area in the selection, in turn.

01:01

When running simulations for isolation areas, the selected link is checked for Isolation Area codes.

01:08

For each Isolation Area code that is found, a simulation is run, and all links with the same code are closed at the same time.

01:16

This is regardless of whether the link is present in the selection.

01:21

Network nodes are tested against user-defined Level of Service Criteria.

01:26

By default, simulation results will be saved for each case

01:29

in which link failure results in failure of nodes in the network to meet the Level of Service Criteria.

01:36

The results can be viewed as Full Play results on the GeoPlan and as a Service Level Report.

01:42

The saved results can then be used to update the criticality fields of network pipes.

01:46

The criticality grade and criticality count values for the affected pipes provide an indication of the significance of the effect on the network,

01:54

should any of the links fail.

01:56

Alternatively, the criticality fields of each link being analyzed can be updated at the end of the simulation for that link,

02:03

and the simulation results can be discarded.

02:06

This option is useful when running Critical Link Analysis on many pipes, as problems due to limited storage for results files are eliminated.

02:15

To use this option, in the Critical Link Analysis Options dialog, check the box for Update Criticality Only.

02:22

But be aware that this option can only be used with a checked-out network.

The critical link analysis, or CLA, run type in InfoWorks WS Pro is:

A presentation slide displays the key points of a Critical Link Analysis, including creating a run type that allows automated testing and reporting, with an image of the associated Critical Link Analysis Options dialog.

CLA exercises are important because:

A presentation slide displays the important reasons for CLA exercises, and how they help to target investment based on customer count and data on at-risk areas.

A simulation is run either for:

A presentation slide stating that Critical Link Analysis simulations can either be run for each selected link or for an isolation area.

Network nodes are:

A presentation slide on network nodes in CLA, and it includes how they are tested, how failure results can be saved, and how results can be viewed as animations in the GeoPlan.

Alternatively, the criticality fields of each link being analyzed can:

A presentation slide describes the purpose of criticality fields, and that the criticality grade and counts give an indication of the significance of the failures within the network.

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