An Information System (IS) is a system that collects, stores, processes, and shares information to help people and businesses make decisions. It includes computers, software, people, and processes that work together to manage data efficiently.
Difference Between Waterfall Model and Prototyping Model
| Feature | Waterfall Model (Step-by-Step) | Prototyping Model (Trial and Improve) |
|---|---|---|
| Process | Follows a step-by-step process where each stage is completed before moving to the next. | Builds a basic model first, then improves it based on user feedback. |
| Flexibility | Not flexible; hard to make changes once a step is finished. | Very flexible; changes can be made anytime. |
| User Involvement | Users give input only at the beginning when requirements are collected. | Users are involved throughout the process and give feedback. |
| Time & Cost | Takes more time and can be costly if changes are needed later. | Can be faster but may cost more if too many changes are made. |
| Risk | High risk if requirements are misunderstood because changes are difficult. | Low risk since users can check and suggest improvements early. |
| Best For | Projects with clear and fixed requirements. | Projects where requirements are not clear and may change. |
| Final Product | Delivered only after all steps are completed. | A working version is available early, and it improves over time. |