For a successful engagement, focus on business growth with a long term outlook and over all cost saving.
We have compiled a list of important factors that you should consider when getting started with the evaluation process.
However be vary of service providers that offer you exceptionally low rates.
Most of them might not be acting with malicious intent, rather they might be taking a risk and promising on what they might not be able to deliver due to miscalculations on their part.
On the other hand, those call center service providers that charge you more than their competition may have acquired the necessary knowledge & skill that enables them to command a premium & deliver a visible RoI sooner.
Thus, it is important to take decisions keeping in mind the long term perspective of your partnership with the service provider.