Sales Pipeline Build & Optimization System.

### Input
Product, deal size, leads, sales cycle

### Task
Design a 5-stage sales pipeline optimized for this product and deal size: Stage names, entry criteria (what qualifies a lead to enter), exit criteria (what moves them to the next stage), and the primary action at each stage. Define the target conversion rate between each stage (e.g., Lead → Qualified: 40%).

### Output
5-stage pipeline: stage names + entry/exit criteria + primary action + target conversion rate per stage