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Evaluate feed availability #1699

@emmambd

Description

@emmambd

Describe the problem

As we start to develop a clear baseline for good GTFS Schedule data quality, we want to evaluate feed availability, or how often the feed URL returns a dataset.

We want to define a threshold of availability that producers should meet. We expect to successfully fetch static data once a day.

Proposed solution

Design questions:

  • How do we distinguish gaps that align with end-of-service-period from gaps from mid-service outages?

Analysis questions:

  • How many outages does the average feed have over the period?
  • How long is the average outage where we can't fetch a dataset?
  • For active feeds that have published a dataset in the last 90/60/30 days, what is the availability rate over a week? A month?
  • What's the average availability rate over 3 months? 6 months? 1 year?

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