The article discusses different quality improvement concepts for software businesses in the nineties. It explains that software development is like a laboratory science, where experiences and processes play a crucial role. Various frameworks like Plan-Do-Check-Act, Experience Factory, Total Quality Management, SEI capability maturity model, and Lean Development are proposed to enhance quality in different ways. These frameworks focus on continuous improvement, customer satisfaction, process assessment, and value-added activities to achieve long-term success in software development.