Question

give exmaple each of the following and little information from software engineering perspective.

Perceptibility:

Affordances:

Signifiers:

Constraints:

Mental Model:

Mapping:

Feedback:

Answer 1

Perceptibility:
How we perceive the things using our senses and mind.
In software engineering, this is related to black box testing and white box testing. User always sees the black box testing and soft ware engineer perceives it as whitebox box testing to give better results to the user.

Affordances:
These are informatives about how an object should be used. for example, user many now about that object at all, but we make sure that we will give information about object like using mobile phones,using ATM cards.

Signifiers:
These are aspects of an item that a programmer uses to indicate intended affordances of an item. for example, in ATM machine, we know that where to insert card and where to enter details and from where to get cash as there are significant parts in machine itself to do these things.

Constraints:
These are restrictions on an object for using it. when we got to ATM, there is constraint for every bank on withdrawl limit for every customer.

Mental Model:
Before modeling actual objetcts, we try to model everything in mind itself. this will be done initially at requirements gatering stage. so that we can add or remove any properties for our objects.

Mapping:
these are meant for tranformation. The Data Flow are desineg on paper are converted in different fucntion when we try to code them.

Feedback:
we take feedback from users, customers, developers,clients for better improvements of object.