Score

The user is given the opportunity to search on the exact overlap in work hours or with an offset of two hours in both directions: more and less overlap. This way, countries with for example just half an hour mismatch with the requested overlap can still be found. That includes locations with Daylight Saving Time, as their time zones are measured as the mean of summer and winter times.

Due to the usage of the offset when not searching exactly on the requested overlap, the overlap of the locations found may differ from the requested overlap. The fit with the requested overlap is maintained in a score. For each overlap, the score is calculated as shown in the table below, with the difference in hours. The score of a combination is the sum of the scores of all pairs of successive locations within that combination.

The table reflects diminishing favourability of locations at increasing absolute difference in overlap. The scale is not linear to emphasize the importance of a small distance to the requested overlap and is chosen arbitrarily.

The resulting list will be sorted on the fit with the requested overlap. Following the concept of Follow-the-Sun, this fit will be calculated over the full 24 hours. Before showing the resulting list, the scores are converted into percentages. A 100% fit will thus only be given to a combination where all overlaps answer to the requested overlap.