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Implementing parallel spreadsheet models for health policy decisions: The impact of unintentional errors on model projections

Fig 3

Distribution of the percentage difference in model output due to implementation errors, by model version and revision.

This figure shows the distribution of the size of unintentional errors for each cell in the spreadsheet model. The horizontal axis shows the percentage difference in model projections for models with unintentional errors compared to the revised, gold-standard model without unintentional errors. The vertical axis shows the percentage of spreadsheet cells. Panels are organized from least complex model revision to most complex (top to bottom). A percentage difference of 0% indicates no unintentional error. No unintentional errors occur in the Re-entry revision of the Single Cell–Re-entry model version. However, nearly half of cells in the more complex Universal revision of the Single Cell model version produced a >5% difference between model projections with versus without unintentional errors.

Fig 3

doi: https://doi.org/10.1371/journal.pone.0194916.g003