Headshack today announced the release of chartConstructor 1.2, an update to the company’s project management application with Gantt and PERT charts. Version 1.2 offers the ability to enter task durations in hours and minutes as well as in days, giving users more control over their charts, as well as several other improvements. ChartConstructor is US$30 shareware and works with Mac OS 10.2 and later.