The Systems Design Life Cycle (SDLC) is a conceptual framework for managing the creation or alteration of information systems. While the exact number of steps can vary between different models (e.g., 7-phase vs. 10-phase), they follow a consistent logical progression. In a detailed, granular SDLC model, the sequence proceeds from analysis and design to building and testing. The "Conversion" step, which involves migrating data and switching from the old system to the new one, is a critical part of the implementation phase. This phase occurs after all development and testing are complete but just before the system enters its final, ongoing "Operations" and maintenance phase. Therefore, in a detailed 10-step model, Conversion is logically positioned as the ninth step.

B. Building: This is the development/coding stage, which occurs in the middle of the life cycle, well before final implementation steps like conversion.

C. System Analysis: This is one of the earliest phases, focused on gathering and defining requirements, happening long before the system is built or converted.

D. Operations: This is the final, ongoing phase of the SDLC where the system is actively used and maintained, occurring after the conversion is complete.

1. Satzinger, J. W., Jackson, R. B., & Burd, S. D. (2012). Systems Analysis and Design in a Changing World (6th ed.). Cengage Learning. In the described six core processes, Process 6, "Deploy the System," explicitly includes the activity of "Convert existing data." This process immediately precedes the final process, "Support the System" (Operations). (See Chapter 1, Figure 1-6, "The six core processes of the SDLC").

2. Valacich, J. S., & Schneider, C. (2014). Information Systems Today: Managing in the Digital World (6th ed.). Pearson. The text describes the "Systems Implementation" phase as including activities like programming, testing, and installation. The installation activity is detailed as involving "converting data from the old system to the new system." This phase follows design and precedes the final "Systems Maintenance" phase. (See Chapter 11, "Developing and Acquiring Information Systems," Section: "Phase 4: Systems Implementation").