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Creating Requirement Specifications and Software Models for PIS and WWS

Patient Information System (PIS)

You are required to create requirement specifications and a number of software models for the Patient Information System for Mental Health Care (PIS) and the Wilderness Weather Station (WWS) respectively, based on the case study information and the stakeholder interviews provided.

Re-read the Patient Information System for Mental Health Care case study. Then read the extracts from stakeholder interviews provided for this case study. Using the information from the case study and the stakeholder interviews:
1. Create a set of user requirements for PIS. This part describes the functional requirements of the system. It also describes the non-functional requirements, including all product, organisational and external constraints. It should be written in a natural language format.Make sure all your requirements are: unambiguous, unitary, complete, verifiable, consistent,modifiable, feasible and succinct.
2. Highlight any requirements that need further clarification (e.g., where there is ambiguity).
3. Select five of the user requirements you have developed and re-frame them as system requirements (e.g., from a developer perspective). Use the following template for your work.

Re-read the Wilderness Weather Station case study and the related stakeholder interviews After study of the requirements and further consultation with stakeholders the developers have come up with the following summary of the required components and functionality for the new Wilderness Weather Station system, and a general description of how the system will work.

Each Wilderness Weather Station consists of:
• A central controlling system. This system:
o Reads data from sensors every five minutes (Sensors are connected via fixed cabling).
o Stores sensor data temporarily in a local MySQL database.
o Every 24 hours, processes sensor readings into weather data reports in JSON format.
o Sends back summary weather data reports at 23.59 to the Data Archiving and Management subsystem of the National Weather Information System via satellite link. This includes the following data: maximum, minimum, and average ground and air temperatures; the maximum, minimum, and average air pressures; the maximum, minimum, and average wind speeds; the total
rainfall and snowfall; and the wind direction as sampled at five-minute intervals.

o Deletes locally stored data after confirmation a sent report has been received by the National Weather Information System.
o Monitors and manages the station power supply unit. If power falls below 33.3%, the system switches itself to power-saving mode. Power-saving mode involves taking and storing only one reading per-hour for each sensor. If power falls below 15%, the system switches itself to hibernation mode.

o Monitors and manages all sensors (windspeed reader, wind direction reader,barometric pressure reader, air temperature thermometer, ground temperature thermometer, rainfall gauge, snowfall gauge):
? If two consecutive scheduled readings are not received from a sensor,the system switches to a back-up sensor. Each sensor has a single backup sensor running on exactly the same firmware.
? Reports faults to the Station Maintenance subsystem of the National Weather Information System.
? Installs firmware fixes and updates into sensors.
• An array of sensors. These sensors:
o Take weather data readings at one minute intervals.
o Are connected via a network cable to the Wilderness Weather Station system.

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