You have to reorganize your data (at least for charting purposes) to:
1a 6:15 3:00 0:15 3:00 2:00 3:00
and plot the above in a stacked bar chart. Then, format alternate bars to
be invisible (from the Format dialog box, from the Patterns tab, set the
area and the border to none).
Essentially, you should extend the concept at
Floating bars in charts
http://www.tushar-mehta.com/excel/newsgroups/floating_bars/index.html
Or, you may consider the add-in
Gantt (Project) chart
http://www.tushar-mehta.com/excel/software/ganttchart/index.html

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Regards,
Tushar Mehta
www.tushar-mehta.com
Excel, PowerPoint, and VBA add-ins, tutorials
Custom MS Office productivity solutions
> hi,
>
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>
> any helps on this would be mucho appreciated....