What are the drawbacks in waterfall software development model?

 The Waterfall model, a linear and sequential approach to software development, has several limitations:

• Lack of flexibility: Once a phase is completed, revisiting it is difficult, making it unsuitable for evolving requirements.
• No early feedback loop: Defects and issues are identified late, increasing cost and effort to fix them.
• Rigid phase progression: Each phase must be completed before moving to the next, which can delay development.
• Change management challenges: Adjusting requirements mid-process is difficult and costly.
• Limited stakeholder involvement: Stakeholders provide input during initial stages but have minimal engagement during later phases.
• Lengthy development cycle: Can result in extended timelines, making it less viable for fast-changing business needs.