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INF20003 Requirements Analysis And Modelling

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Case Study: DigiHealth Medical Services

DigiHealth Medical Devices is a local company that specialises in medical monitoring through remote, mobile telecommunication devices. One of the newly developed devices in their range of products is a portable and wearable glucose monitor embedded in a wristband which transmits results to a designated medical center in real time. Providers and patients can incur significant costs when glucose levels are not maintained within acceptable tolerances. Episodes of high or low glucose can results in expensive medical costs and possible hospitalisation. These episodes if left unchecked can then lead to more severe and expensive long-term ailments like vision, circulatory and renal problems. The device is known as the Real-Time Glucose Monitoring device (RTGM) and it is approximately the same size as the current model Apple iWatch. The data collected by the device is sent to MyHealth Medical Centres, which has partnered with DigiHealth in the development of this product.

The RTGM currently works very well with Apple iPhones, but it does not integrate with all the Android phones. DigiHealth plans to develop the app further for improved integration in the Android operating system. Once the updated version is completed, MyHealth Medical Centre patients will have free use of the app across all popular smart phones and DigiHealth will resell the app to other health care providers and possibly the government.

Assignment Specifications


According to the Australian government budget spending, health (in the form of medical/ healthcare/ hospitals) is the 3rd most expensive component of the national budget. At $81.8 billion it is nearly 2.5 times larger than the national defence budget and 2.2 times larger than national education budget (Commonwealth of Aust, 2019). According to a 2019 Deloitte analysis report on the Global Healthcare Outlook, Green (2019) stated that the global cost of health care is projected to increase at an annual rate of 5.4% per year till 2022. So, with growing expenditures forecasted in the global health care area the ability to reduce the costs and improve efficiencies within the health system is an imperative for both government and private medical providers.

Health care stakeholders besieged with the challenges of managing the clinical, operational, and financial challenges envision a future in which new business and care delivery models will be aided by data rich driven digital technologies (Green, 2019). By using digital technologies this may help to solve today’s problems and contribute to the construction of a sustainable foundation for affordable, accessible, high-quality health care. Green (2019) stated that the vision of a sustainable, accessible and affordable health care model may have a greater probability of becoming a reality if all stakeholders actively participate in shaping the future. This can be done by shifting focus away from a system of sick care in which we treat patients after they fall ill, to one of health care which supports well-being, prevention, and early intervention.

With the development of information technology and people’s increasing concerns on healthcare, the healthcare wearable technology has been gaining additional attention in recent years. The concept of wearable technology is relatively simple and a natural extension of how existing mobile devices (mainly the smart phone) can be used as a central hub for low powered, short distance network ancillary devices that can be used to support and add value back to the users. Commercially available wearable devices started to become available in 2012, when Google Glass came into public view and set off an upsurge of wearable devices. There are many kinds and brands of wearable devices, such as iWatch, Fitbit and the Samsung Active range of wristbands and smart watches, etc. According to Chan et al (2012) that one of the biggest application of wearable devices is in the healthcare and medical fields and according to a report released by P&S Market Research, the global healthcare wearable device market is predicted to reach 1630.3 million dollars by 2020 with a growth rate of 46.6% during the years 2015–2020. The healthcare wearable device has combined health attributes together with technology attributes and has unique advantages on tracking and transforming users’ health information in real-time (Chan et al, 2012).


The tasks for this assignment will be divided into two main parts.

Part A: Will focus on defining the stakeholders also how to elicit requirements as well as identify some functional and nonfunctional requirements. You will also be required to provide recommendations (with evidence) for further developments of future products for the health care industry.

Part B: Will focus on the technical and data requirements of the product, including the development of a context diagram, creating an events table, creating DFD fragments and an ERD diagram.

Please follow the standard report writing format and structure. (See Assignment Guide for further information)

Part A:

Answer the following questions with clear statements and evidence.

  1. Define the RTGM’s stakeholders? Should patients be included in defining the system requirements? Why or why not? Should RTGM interact with medical professionals other than physicians? Why or why not?

  2. If you were the lead analyst for RTGM, how would you determine the requirements? Be specific in your answer. List several questions you need answered.

  3. What are the primary functional requirements for the system as described so far in the case?

  4. Construct a proposed activity diagram to show the potential flow of activities if low or high glucose was measured by the device.

  5. Are the parameters for alerting patients and medical personnel the same for every patient? Can they vary over time for the same patient? What are the implications for the system’s functional requirements?

  6. Briefly describe some possible non-functional requirements for RTGM.

  7. By reviewing the background, provide a brief argument with evidence to persuade the managers at DigiHealth to where (which medical problem or issue) they should focus their development off the next wearable healthcare device.

Part B:

Please use the appropriate modelling tools (Visio or similar) to complete the requirements.

1. Develop a context diagram encompassing all the use cases in Figure 1

By using the provided level 0 Data Flow Diagram (DFD) (Figure 2). Complete the Event Table.

  1. Based on the diagram provided (Figure 2) and the creation of the event table (task 2) develop a DFD fragments for the following use cases.

  1. View history
  2. Send message to the doctor
  3. Send message to patient
  4. Develop a complete ERD for the identified entities and relationships. Must show correct cardinalities as well as entity attributes.
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