We conduct a desktop survey using online tools to estimate the one-time installation or connection fee. We try to get an accurate estimate but we cannot be 100% certain. The final installation fee will be determined after we conduct a field survey. The process is as follows:

1. Conduct a desktop survey
2. Send proposal to the customer
3. Customer approves the proposal (including estimated installation fee)
4. Conduct a field survey
5. If the installation fee in the field survey is different from the installation fee in the desktop survey, send a revised proposal to the customer