Table 4: Performance overview of the six versions.

Avoid wrong format Avoid wrong date Time efficiencyUser satisfaction

Version 1 (separate) 0 + 0 0
Version 2 (drop-down) + + 0
Version 3 (left) 0 + + +
Version 4 (inside, permanent) 0 + 0
Version 5 (inside) + + +
Version 6 (calendar) + 0