MS Project

Hi Joyce

Thank you for your question. There are a number of possible causes:

Most frequent is when tasks have been entered based on 8 hour working days (Tools > Options > Calendar) and the calendar has been modified to reflect a different set of hours (Tools > Change working times). The mismatch leaves decimal fractions of days appearing on the chart.

It can also happen if tasks are progressed using hourly intervals of work (rather than duration).

Or when a constraint is set to a time part way through a day

Would any of these be possible causes in your plan? Let me know what you find.

Kind regards,
Andrew