Anomalies
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Anomalies
Outliers, aberrations, fat tails, trouble at the mill and maybe something good once in awhile
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Scooped by Ellie Kesselman Wells
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Pipeline Safety Tracker

Pipeline Safety Tracker | Anomalies | Scoop.it
Every year the nations oil and natural gas pipelines suffer hundreds of ruptures and spills. We map major pipeline accidents from 1986 to the present.
Ellie Kesselman Wells's insight:

Pipeline technology at scale was developed 50+ years ago. Ruptures due to material weld equipment failure decreased since 1986, ranging from 16% to an all-time historical low of 8% in 2001. However, incidents due to material weld failures tripled the next year, and continued rising, to 30% in 2010 and 2011. Absolute counts of pipeline incidents per year have been stable since 1986. What's going on with these material weld equipment failures???

A few possibilities to consider are:

1. normal wear and tear, given the weld materials' expected lifetimes;

2. poor maintenance;

3. higher corrosiveness of the pipeline contents than expected or than in the past.

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Dropping the Call in New York City

Ellie Kesselman Wells's insight:

Interactive graphic via WSJ: New York City-area cell phone service has a 97% success rate. Yet failed calls in a recent Nielsen test show patterns along roadways and various city neighborhoods and suburban counties. The cause? Unclear.

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Estimating rates from a single occurrence of a rare event

Estimating rates from a single occurrence of a rare event | Anomalies | Scoop.it
Ellie Kesselman Wells's insight:

Use survival analysis rather than event rate.

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