Problem Description (Refined version of Assignment 4):
You’re developing the software for a company that monitors home alarm systems. After reviewing some of the your outline of patterns you would use, our customer that
you create a couple diagrams of what you architecture looks like using the notations described in our book “Software Architectures in Practice” and that you apply the
techniques described in Chapter 14 to analyze your architecture to verify that the architecture will satisfy the requirement of the system. The have provided a
revised description (next paragraph), with some more details.
There will be one sensor for each door or window in the home that detects when they are opened. If the home alarm system is activated, the home (sub)system must (1)
turn on the alarm within 5 seconds of sensing the opening of any opening other than a door next to a control pad, which allow 30 for the user disarm code to be entered
before the alarm is turned on, and (2) send an alarm to the Alarm Monitor Company’s central monitoring location within 15 seconds for an opening other than a door next
to a control pad, and 45 seconds for a door next to a control pad. The system at the central monitoring location, (1) records the event, and (2) notifies a human
operator what’s happening within 30 seconds of receipt of the alarm sent from the local home monitoring system, and (3) automatically dial the home, within 45 seconds
of receipt of the alarm sent from the local home monitoring system, and hands-off the call to the operator, who will to attempt to verify that there is a break-in. If
no one answers, or someone answers but doesn’t give the agreed to safe-word or give the in-trouble word, then the operator will notify the police within 1 minute if no
one answers, or 2 minutes if call is answered. All actions taken are recorded.
Part 1 (5 points): Create an architecture
Create an architecture for the whole system based on the patterns you choose in the last exercise. (Is you decide to change patterns, describe the changes including
why.) Your description should include the following:
1. A diagram showing the Company’s Central Monitoring Center, and multi-homes being monitored.
2. A diagram of the architecture for the Central Monitoring Center.
3. A diagram of the architecture in a typical Home.
4. A short description of each software component.
Use the notation described in the SWAIP book for now.
Part 2 (5 points): Describe the qualities that are important for the system.
Apply the appropriate techniques from Chapter 14 (or in the pattern description, if any) to verify that you architecture is likely to produce a system that achieves
the quality goals you identified in Assignment 4 (i.e., minimums & maximums) and satisfies any constraints in the customer description (this constrains are qualities
that you must achieve). If you need certain values, e.g. execution speed of the CPU or how many cores in the CPU, then either do some research on reasonable values
make a list of the values you obtain from your research or any assumptions you made and give a reference to the source.
If you determine that for some reason, your architecture does not achieve your quality goals, then explain why. (You may find that some goals are not achievable).
Create a PDF file with your results for part 1 & 2.
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