PERT chart - Sale problem solution

"Solution selling is a sales methodology. Rather than just promoting an existing product, the salesperson focuses on the customer's pain(s) and addresses the issue with his or her offerings (product and services). The resolution of the pain is what constitutes a "solution". ...
Followers of "solution-selling" generally apply a consultative sales approach to all aspects of their sales process (or during a sales cycle) including:
Prospecting;
Diagnosing customer needs;
Crafting a potential solution;
Establishing value;
Bargaining for access to decision-makers;
Positioning proof, ROI and the total solution;
Negotiating a win-win solution;
Following up to ensure customer success.
The solution selling methodology has evolved as key components of professional selling evolve. As a result, solution selling has become more broadly defined - to include dimensions of "sales process", "competitive selling", "value selling" as well as "consultative selling" or "complex selling" which set the focus on the team's aspects of the sales." [Solution selling.Wikipedia]
The PERT chart example "Sale problem solution" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the solution Seven Management and Planning Tools from the Management area of ConceptDraw Solution Park.