Articulate Dell’s strategy and business model, including build to order and direct sales strategy

Articulate Dell’s strategy and business model, including build to order and direct sales strategy.
Assess whether Dell should expand into new products, and if so, identify what products would be a good fit.
Determine whether Dell’s customer service and technical support yields satisfied customers. Provide a rationale for your answer.
Assess whether Dell’s strategy can be supported over time, thereby providing a sustained competitive advantage in the marketplace.