Sequence diagram

FIG. 28-12 Logic sequence Diagram 1 used to determine behavior type (Case 1, 2, and 3) and corrosion rate from a CBD. 

FIG. 28-13 Logic sequence Diagram 2 used to evaluate localized corrosion resistance from a CBD. 

FIG. 28-14 Logic sequence Diagram 3 used to qualitatively evaluate the degree of corrosion for systems that cannot be evaluated by extrapolation of the cathodic polarization Curve 2 from a CBD. 

Operating instruc tions and time-sequence diagrams provide insight into the basis for the operating conditious. They will also provide a foundation for the subsequent discussion with operators. The time sequence diagrams may provide insight into any difficulties that will arise during the unit test. 

Figure 2.16 Assembly sequence diagram for a castor wheel...

Through an assembly sequence diagram for each component in the product, the assembly variability risks highlighted by an analysis are logically mapped. An assembly sequence declaration compels the designer to focus on each stage in the assembly and therefore makes the task of identification of potential problems much easier. 

Figure 2.41 Assembly sequence diagram for the solenoid end assembly design...

RISKMAN embodies PLG s scenario-based, engineering-approach displays and calculates event sequence diagrams, fault trees, and event trees. It allows for system-specific data updates and accoums for dependencies between systems. 

Event Sequence Diagrams (ESDs) and Event Trees (ETs) were used to logically di plant re.spon.se to various initiator.s in a two step process ... 

Operational sequence diagrams are flcw-charting techniques that represent any sequence of control movements and information collection activities that are executed in order to perform a task. Various activities in the diagram are represented with a symbolic notation, supported where necessary by a text description. For the majority of simple applications, OSDs assume a linear flow drawn from top to bottom with a limited degree of branching and looping. The symbols used are usually tailored to fit the type of task being studied and its level of analysis. 

FIGURE 4.7. Temporal Operational Sequence Diagram in a Slitting Coated Fabric Operation (from Barnes, 1980). 

FIGURE 4.8. Partitioned Operational Sequence Diagram for Loading a Recipe to a Computer Controlled Reactor (adapted from Kir-wan and Ainsworth, 1993). 

Operational sequence diagrams are very useful to show temporal, spatial, and even conceptual relationships among operations that are difficult to show by textual or tabular representations. 

Operational sequence diagrams can become cluttered and confusing when used for complex or highly conditional tasks. It is particularly important that the analyst is working to the level of detail that is most appropriate. 

Operational sequence diagrams cannot represent highly cognitive tasks because it is difficult to assign cognitive components to discrete symbols. 

FIGURE 4.8. Partitioned Operational Sequence Diagram for Loading a... 

More massive stars in the upper part of the main-.sequence diagram (i.e. star.s with masses in the range 1.4-3.5 M ) have a somewhat different hi.story to that considered in the preceding sections. We have seen (p. 6) that such stars consume their hydrogen much more rapidly than do smaller stars and hence spend less... 

We haven t detailed here how the composition works. The smaller actions might happen in parallel or in sequence, or they might be repeated we give that detail separately. One way to do that is with a sequence diagram. This is used to illustrate a typical occurrence of an action (see Figure 1.8). The horizontal bars in these diagrams are occurrences of actions the vertical bars are instances of objects. 

System, which we initially treat as one object (see Figure 1.15). Once again, we can draw a sequence diagram to illustrate how the refinement works (see Figure 1.16). 

Figure 1.16 Sequence diagram, including the role of the software system.

Repeat until a suitable combination of Instructor and dates found Figure 1.22 Sequence diagram including internal software components. 

Repeat for every suitable instructor Figure 1.23 Alternative sequence diagram, design version 2. 

In program code, one object requests that another object perform an operation the result is a state change, and some outputs. The interactions are illustrated with a sequence diagram Objects are vertical lines, and each operation request is an arrow. This also applies outside of code objects a,b, and c could be real-world objects such as client, company, and instructor or... 

Each occurrence of such a joint action is shown as a horizontal bar with ellipses in a sequence diagram, whereas the finer-grained operations were depicted as simple arrows. Note that each action occurrence could be realized by many different finer-grained interactions, eventually reducing to a sequence of operations. 

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