An article worth reading is... Death of the Sales Funnel as we know it
In summary,
- Buyers don’t follow a linear path
 - Distraction is the number 1 barrier to sale
 - Tracking is flawed at best
 - Reporting is abysmal
 - Should the sales funnel be transformed to a neural network?
 
so maybe we need to think more about...
The Customer Decision Journey  (see www.mckinsey.com) 
It’s a pretty simple concept really but clients like it because this visual highlights and isolates the most important aspects/steps of the journey:
- Consider: What brands/products do consumers have in mind as they contemplate a purchase?
 
- Evaluate: Consumers gather information to narrow their choices.
 
- Buy: Consumers decide on a brand and buy it.
 
- Post-purchase: Consumers reflect on the buying experience, creating expectations/considerations that will inform a subsequent purchase
 
- Advocate: Consumers tell others about the product or service they bought.
 
It’s a pretty simple concept really but clients like it because this visual highlights and isolates the most important aspects/steps of the journey:
- Consider: What brands/products do consumers have in mind as they contemplate a purchase?
 - Evaluate: Consumers gather information to narrow their choices.
 - Buy: Consumers decide on a brand and buy it.
 - Post-purchase: Consumers reflect on the buying experience, creating expectations/considerations that will inform a subsequent purchase
 - Advocate: Consumers tell others about the product or service they bought.
 
See also The Consumer Decision Journey and Aligning with the Consumer Decision Journey