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devices software configuration size
A top tank A head tank A head valve A drain tank
data flow diagram entity relationship model require ments model object model
graphic-based char-based web-based text-based
requirements planning phase user design phase construction phase cutoverv phase
warm-up allows the hydraulic system to become charged with oil warm-up allows the relief valves to be properly tested hydraulic strainers operate only during the warm-up period hydraulic fluid must be at the proper viscosity
initial scope definition requirements modeling process object modeling process architecture design process
system proposal system design model new system architecture new information system
data flow diagram entity relationship model requirements model object model
team-based process-based based on data model-based
allows looping allows for dummy tasks allows branching allows multiple project end results
central air condition system high velocity system low velocity system single duct system
object-oriented analysis structured analysis process analysis prototype analysis
project managers system administrators software programmers key users
structured analysis object-oriented analysis prototype analysis process analysis
A． LAN WAN Internet Ethernet
devices software configuration size
to share sharing share shared
user design phase cutover phase requirements planning phase construction phase
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