Represent the decision making involved in the operation of the following wash-machine by means of a...

Represent the decision making involved in the operation of the
following wash-machine by means of a decision table:
The machine waits for the start switch to be pressed. After the user
presses the start switch, the machine fills the wash tub with either hot
or cold water depending upon the setting of the HotWash switch. The
water filling continues until the high level is sensed. The machine starts
the agitation motor and continues agitating the wash tub until either the
preset timer expires or the user presses the stop switch. After the
agitation stops, the machine waits for the user to press the
startDrying switch. After the user presses the startDrying switch,
the machine starts the hot air blower and continues blowing hot air into
the drying chamber until either the user presses the stop switch or the
preset timer expires.

Expert Solution

Step 1 : Identify the Conditions :

Following are the various conditions which are used by the washing machine to make decision:

Start switch is pressed
Hot Wash switch is pressed
Water high level is sensed
Preset timer is expired
Stop switch is pressed
Start Drying switch is pressed

Step 2 : Identify the Actions :

Following are the various actions performed by the washing machine depending on the conditions and the rules:

Wait
Fill wash tub with hot Water
Fill wash tub with cold water
Agitate the wash tub
Blow hot air into the drying chamber

Step 3 : Identify the Rules and Construct decision table :

		Rules
Conditions	Start switch is pressed	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes
	Hot Wash switch is pressed		Yes	No
	Water high level is sensed		No	No	Yes
	Preset timer is expired				No	Yes	No	Yes	No
	Stop switch is pressed				No	No	Yes	Yes	No
	Start Drying switch is pressed								Yes
Action	Wait	✔				✔	✔	✔
	Fill wash tub with hot Water		✔
	Fill wash tub with cold water			✔
	Agitate the wash tub				✔
	Blow hot air into the drying chamber								✔

Note : The Conditions marked in grey are those which will not affect the decision making in the given context. Here this is also assumed that the machine must be switched on for all other actions to take place else the machine will be simply in waiting state. Actions marked with ✔ is to performed on encountering a condition specified above it using a Yes/No entry.

venereology answered 1 week ago

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