Identify Customer Needs
Table of Contents
Step 1. Gather Raw Data From Customers
- First Sponsor Interview
- Interviewers: James Stern , Cory Laudenslager
- Sponsor: Sara Gombatto
- Date: 9 December 2009, Nazareth Research Clinic
Step 2. Interpret Raw Data in Terms of Customer Needs
Overall goal of the project is to create a motion tracking sensor system which will allow the patient who suffers from back pain to go about their daily routine and have information stored on the range of motion of their spine. This data will then be able to be analyzed for repetitive motions which may help identify and alleviate the source of back pain.
Desired System Attributes:
- Accuracy: We need to provide ~1% error.
- Scope of measurements: 3 DOF.
- Use of paraspinal sensors to measure spinal segments (the triangle)
- Cannot have electromagnets
- Enclosures and wires cannot be reflective (not highest priority)
- ~1 day battery life (Come into office in the morning to have system attached, come back at end of day to transfer data from logger).
- Interface with P10011 design
- Doesn't have to have high sampling rate. (Their current system does 200Hz but is not expecting that high from our design)
- Try to keep format as C3D file format to standardized with her current system (3D Visual).
- Can be cleaned, robust, easy to use.
- Portable-can be carried around with client (Looking to be around the 1 Inch X 1 Inch X 1/2 Inch)
- Does not interfere with patient's daily life (Important that pressure on the back when sitting does not affect measurements or damage sensors).
Step 3. Organize the Needs into a Hierarchy
Step 4. Establish the Relative Importance of the Needs
|Need||The Product Needs to||Importance|
|Need 1||The Product Should be Sanitary||1|
|1.1||Sensor enclosures, microcontroller, and wiring must be able to be sanitized in a short amount of time without damaging components.|
|1.2||All exposed components do not have any crevices or areas where dirt could collect.|
|Need 2||The Product should be Portable||2|
|2.1||A battery life of at least one working day is present.|
|2.2||A data storage mechanism is present which captures motion tracking information.|
|2.3||A method of interfacing with PC's allows stored information to be transferred easily.|
|2.4||The entire subsystem is sufficiently small enough for a human to transport on their body without inconvenience.|
|Need 3||The Product should be Comfortable for Patient||3|
|3.1||Patients can wear the product in their natural environment without any discomfort.|
|3.2||The product does not hinder any normal human motion.|
|3.3||Patients are specifically able to sit without discomfort when using a lumbar tracker.|
|Need 4||The product should be Durable||4|
|4.1||The complete system sustains the normal wear and tear of a cell phone or comparable device.|
|4.2||The complete system withstands low-force impact comparable of a drop from desk level.|
|4.3||The complete system survives X cycles of use without failure.|
|Need 5||The Product should be Accurate||5|
|5.1||Sensors provide 3 DOF of measurement|
|5.2||System provides 1 degree of accuracy.|
|5.3||Sensors provide a reasonable sampling rate (200Hz is satisfactory).|
|5.4||System provides capability to measure multiple body parts- arm, leg, lumbar.|
|5.5||System is not magnetic or reflective.|
|Need 6||The product should be easy to use||6|
|6.1||System does not take more than 20 minutes to set up.|
|6.2||System is self-sustaining during the day- patients do not need to tweak it at all.|
|6.3||Information is presented either in C3D format or via a custom GUI.|
|6.4||System contains a Zero mechanism.|
|6.5||System is rechargeable.|
|6.6||A method of storing system safely is presented.|
|6.7||System interfaces with P10011 Element.|