Software modeling and UML, with UML-CS
SysML/UML: How to use? With what method? Example of application with UML-CS and SysML-CS

Figure 12 shows the UML-CS software modeling approach.

This process is organized into two main phases: Logical Design, on the left-hand side of figure 12 and Physical Design, on the right-hand side of figure 12. Logical Design is itself divided into four stages: Needs Analysis, Object Analysis, Architecture Design and Object Design. Each step, in turn, is broken down into activities, e.g. for the Needs Analysis step: Definition of the actors, Definition of the context and Description of the system...

Note that UML-CS is an instance of the "Software Analysis/Design" part described by the UP