Chapter 2: Requirements and Specifications Customer Needs Assessment As stated before, the improvements must outweigh the complications of implementation. There has to be a reason to
buy this door lock and replace their own door locks with it. That is why convenience and reliability are the first two
customer needs. These are possibly the most important and apply to almost every engineering specification and do
not require as much explanation as the other three.
One of the more interesting requirements is the hassle-free installation. Of course the door lock will require minor
assembly but the process of installation should not be overly complicated. The device should be a complex system
simplified for the common consumer. Another important feature is the need for failsafes and overrides. In cases
where the owner may lose their keys, the owner of the door lock should not be denied access to the door at any time.
There should always be a way in that is only accessible to the customer. These needs are listed in Table 1.
Requirements and Specifications The requirements and specifications were generated with the customer needs as a basis. These specifications are
listed in Table 1. To the left of the Engineering Specifications are the Customer Needs that each specification meets.
The justification on right details the thinking and reasoning behind the specifications and how they fit the customer
needs.
TABLE 1
RFID
S
ECURITY
D
OOR
L
OCK REQUIREMENTS AND SPECIFICATIONS
Customer Needs Engineering Specifications Justification 1
Unlocks in the presence of RFID tag within
20cm
This will make the door
easier to unlock than a
regular key
2, 3
The physical door lock should be thinner
than the doorframe
This way the door lock
will be hidden and
avoid external
tampering
1, 3
Should be easy enough to install in 5 steps
maximum
Simple enough for
anyone to install
1, 2
The lock should be powered by a 9V source
so that it can run on 9V batteries as a
backup
This is a common
voltage to find within a
house
Customer Needs 1.
Needs to be convenient so that people will have an easier time unlocking their doors
2.
Needs to be reliable so that people can trust the door lock
3.
Hassle-free to install so that anyone can install it into their home with ease
4.
Failsafe and overrides in case the RFID key is lost or the power fails