7
How HMI Has Been Evolving
THE LACK OF A HIERARCHY REQUIRED MANY
SCREENS TO PROVIDE AN OVERVIEW
P&IDs represent how a plant is built but not how it operates. Thus, one of the downsides of using the P&ID design representation is that navigation of information may
become complicated and hard.
Figure 1.9 shows the navigation paths to retrieve just four pieces of information.
However, task analysis can reveal information grouping and better ways of presenting data in the graphics.
HMI Philosophy
Corporate Guidelines &
Specification
Standards (ISA 101, ISO 11064-5)
Statutory & Regulatory
Requirements
FIGURE 1.8 Standard and Guideline Hierarchy.
FIGURE 1.9 Navigation to screens to make moves for a task.
How HMI Has Been Evolving
THE LACK OF A HIERARCHY REQUIRED MANY
SCREENS TO PROVIDE AN OVERVIEW
P&IDs represent how a plant is built but not how it operates. Thus, one of the downsides of using the P&ID design representation is that navigation of information may
become complicated and hard.
Figure 1.9 shows the navigation paths to retrieve just four pieces of information.
However, task analysis can reveal information grouping and better ways of presenting data in the graphics.
HMI Philosophy
Corporate Guidelines &
Specification
Standards (ISA 101, ISO 11064-5)
Statutory & Regulatory
Requirements
FIGURE 1.8 Standard and Guideline Hierarchy.
FIGURE 1.9 Navigation to screens to make moves for a task.