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Ideal Stock Amount is a yearly estimate of the “target” number of doses of a vaccine you should have based off of your population served (i.e. catchment population). This model for estimating the number of vaccine doses you need is irrespective of vial size, packaging, manufacturer, etc so that you focus on a single number of doses that you should have at any given time. For more rural service delivery points, this time is typically the number of doses you should have in a year, divided by 12 months with the idea that your refrigerator can only hold up to about a month's worth of vaccines at a time. The Ideal Stock Amount (ISA) is defined configured by the Facility Operator or Implementor Implementer/Administrator and can be used in reorder calculations for OpenLMIS.
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