How long you should you trial the effectiveness of Telemarketing?
Well it depends if you are anticipating using telemarketing as a long term marketing tool or a once off. If the later, then the longer the better. Why?
Telemarketing is extremely effective, however it does take a lot of calls; more specifically call-backs.
It is very rare to reach your decision maker on the first call. So you need to allow for multiple calls.
Your key decision maker could be not available for 100 reasons. So you need to allow for this.
Even if you do reach your decision maker, you may need to allow enough time for them to think about your offer. Every situation is different.
In any lead generation activity, there is a pyramid that reflects the reality of marketing.
At the very top of pyramid, you have people who are 1) interested and 2) ready to act.
As you move down the pyramid there will be people at various stage of interest and readiness to act.
The vast majority are going to be people, not ready to act and or not highly interested. So you need to allow enough time to nurture these leads to conclusion.
The other issue with short term campaigns is running the risk of calling back too soon due the condensed time frame.