Broadband Rollout, Surveys Installations and Troubleshoots

I am tasked to come up with a business model that looks after Broadband customers very well. The technology will be WiMAX.
I am not happy with the way the field operation team has been responding to schedules, appointments, troubleshoots.
Please provide me a simple idea on how to program and cost effectively succeed in scheduling a team of 8 people, that will complete
1) surveys for pre-sale,
2) Install of outdoor WiMAX CPEs
3) Post sales troubleshootings on site

All with minmising costs.

I have tried simple things like deploying IPCOP, endian firewall for heavy users, leaving a bootable cd on site for remote troubleshoot.

What can I improve ? is it training of the staff ?