QUESTION $4$

For SCTMS to align with urban infrastructure and address future needs, a structured design methodology is required. Answer the following questions to explore its implementation.

$4\mathrm{.}1$ Explain how data flow diagrams $($DFDs$)$ can be employed to depict how information moves through SCTMS modules like sensors$,$ traffic signals, and the central control system.

$4\mathrm{.}2$ Identify $5($five$)$ critical analytical skills that a systems analyst should possess to evaluate and refine complex city traffic data in SCTMS$.$

$4\mathrm{.}3$ How can a relationship diagram aid in structuring key data points within the SCTMS$,$ such as vehicle counts, traffic signal timings, and emergency vehicle routes?

$4\mathrm{.}4$ Describe how joint application design $($JAD$)$ sessions can be used to collaborate with city officials and traffic management experts to refine SCTMS requirements.