• Requires more customer involvement than other linear approaches.• Problems can occur due to integration between iterations. When to use the incremental model• This model can be used when the requirements and objectives are clearly understood. • When new technology is used. • When high-risk opportunities and targets are available in the industry. • Resources with the necessary skills and aptitude for knowledge are not available. • The product has rapid demand; need to bring a product to market early. • Key requirements must be clearly defined and