Design each task in a problem-solving effort so that it is most fruitful and provides the most information or guidance:
Plan and design a prototype of product (physical system, algorithm).
Code program(s) fit to gather and analyze data.
Create the proper wiring and components for physical tracking system.
Connect program(s) to physical tracking system.
Test system's functionality for tracking and analysis.
Debug/make changes according to testing results.
Set up application and server for data storage, user access, and communication.
Test connection to application/server for functionality.
Debug/make changes according to testing results.
Finalize product.
Use various attributes of the final solution state to guide earlier decisions made along the solution path:
Non-intrusive for the wearer.
Efficient in information gathering.
Reliable in establishing and retaining wireless connection between physical system and digital server/application.
Efficient in tokenizing information for wireless communication.
Quick in wireless communication/transmission of information.
Long-lasting in regards to battery efficiency.
Define design goals and design specifications:
The radius of sensor detection should be 2m around the individual wearing the system. This radius should take into account the full range of movement of an individual, and be able to detect any motions they make.
The detection frequency should be around 58-63.5GHz to have precision in the detection range and accuracy.
The accuracy of the sensors should be as high as possible. We would ideally aim for 99% accuracy in order to have as few false alerts as possible while keeping in mind a capacity for error.
The operating temperature should account for a wide range of environments, with the ideal range being -20 °C to 60°C.
The mobile app component should have a simple and clear interface, clearly labeling categories such as alerts, patient's information/data, timestamps of abnormal movements, and other forms of movement and bio data.
The finished product should be accessible and as affordable as possible for a wide range of patients. The cost of patient subscription should be around $30 per month, with group discounts (hypothetically $200-500/month for groups of users) available for senior housing and hospitals.
Source: (Sensor Data Comparison, DF Robot)
Eliminate paths that do not satisfy the desired design goals and/or specifications:
We will not use a short-lasting battery for our product because having to constantly charge it is a cumbersome task. Plus, if a user happens to fall while the device is charging, our device fails to deliver on its purpose.
We will not use fragile materials as our device needs to be strong enough to survive the impact of a fall.
We will not implement a complex process to setup and use the device to ensure it is user-friendly for elderly individuals and caregivers.
We will not have the device rely solely on Wi-Fi because it can be unreliable or unavailable in certain environments. For seamless operation, we will consider implementing a backup communication method, like Bluetooth.
We will not include features or materials that cause discomfort. Some examples of this include non-breathable materials, sharp edges, and a bulky enclosure.