Introduction Go through requirements process with the BE Design team Go through requirements process with the BE Design team Write an SRS form, complete with: Write an SRS form, complete with: Work Context Diagram Work Context Diagram Use Cases Use Cases Requirements Requirements Functional Functional Non-Functional Non-Functional Fit Criterion Fit Criterion Constraints Constraints Risks Risks

Device Background Device is to help Parkinson’s patients. Device is to help Parkinson’s patients. Parkinson’s is a disease that effects the brain. Parkinson’s is a disease that effects the brain. Current treatment involves Levodopa. Current treatment involves Levodopa. Levodopa subdues the symptoms. Levodopa subdues the symptoms. Levodopa also destroys the part of the brain that Parkinson’s effects. Levodopa also destroys the part of the brain that Parkinson’s effects.

Project Goals Goal Goal Create a device that accurately measures the Levodopa levels in a patient Create a device that accurately measures the Levodopa levels in a patient Advantage Advantage To have a standard and accurate way of measuring Levodopa levels. To have a standard and accurate way of measuring Levodopa levels. Metric Metric Give a patient a certain amount of Levodopa and use the device to see if it can accurately measure that amount of Levodopa Give a patient a certain amount of Levodopa and use the device to see if it can accurately measure that amount of Levodopa

Goals Goal Goal Use the device to prescribe the least amount of Levodopa to relieve the symptoms of Parkinson's disease. Use the device to prescribe the least amount of Levodopa to relieve the symptoms of Parkinson's disease. Advantage Advantage The lowest and most effective dosage of Levodopa can be given to the patient, decreasing the deteriation of the substantia nigra The lowest and most effective dosage of Levodopa can be given to the patient, decreasing the deteriation of the substantia nigra Metric Metric Take a control group of untreated Parkinson's patients, patients under the current treatment, and patients using the new device. then measure the deterioration of the substantia nigra. Take a control group of untreated Parkinson's patients, patients under the current treatment, and patients using the new device. then measure the deterioration of the substantia nigra.

Goals Goal Goal The device should be portable. The device should be portable. Advantage Advantage With a portable device, the user will easily be able to take the device home with them instead of having to travel to use it. With a portable device, the user will easily be able to take the device home with them instead of having to travel to use it. Metric Metric This goal will be a success if the device requires no third-party assistance in transporting. This goal will be a success if the device requires no third-party assistance in transporting.

Goals Goal Goal The device shall return results of Levodopa levels no longer than five minutes. The device shall return results of Levodopa levels no longer than five minutes. Advantage Advantage A quick response time makes the device convenient for the user to use. A quick response time makes the device convenient for the user to use. Metric Metric Measure the time it takes to input a bodily sample and output the results. If it is less than five minutes, it is a success. Measure the time it takes to input a bodily sample and output the results. If it is less than five minutes, it is a success.

Context Diagram

Use Case Example Use Case Example Use Case Description: This use case describes the "normal" flow of events for the use of the device. Description: This use case describes the "normal" flow of events for the use of the device. Actors: Actors: Marty McFly: Parkinson’s patient on Levodopa treatment for a year. Dr. Benjamin Stone: Mr. McFly’s doctor Pre-Conditions: Marty is already diagnosed as Parkinson’s patient and has been on Levodopa treatment previously. Pre-Conditions: Marty is already diagnosed as Parkinson’s patient and has been on Levodopa treatment previously.

Use Case Basic Flow Basic Flow 1. The device is administered to Marty. 1. The device is administered to Marty. 2. A bodily sample is taken from Marty and processed by the device. 2. A bodily sample is taken from Marty and processed by the device. 3. The device returns raw data to a storage system. 3. The device returns raw data to a storage system. 4. The stored raw data are sent to the analysis system. 4. The stored raw data are sent to the analysis system. 5. There the data is analyzed and Levodopa levels are output for the doctor. 5. There the data is analyzed and Levodopa levels are output for the doctor. 6. Based on the Levodopa levels and patients relief of symptoms, Dr. Stone decides to recommend a lower dosage of Levodopa to maintain treatment at the lowest possible dosage. 6. Based on the Levodopa levels and patients relief of symptoms, Dr. Stone decides to recommend a lower dosage of Levodopa to maintain treatment at the lowest possible dosage.

Use Case Alternate Flows Alternate Flows Based off of the Levodopa levels, Dr. Stone prescribes a greater amount of Levodopa to Marty. Based off of the Levodopa levels, Dr. Stone prescribes a greater amount of Levodopa to Marty. Dr. Stone decides the current prescription is adequate and does not change the prescription. Dr. Stone decides the current prescription is adequate and does not change the prescription. Dr. Stone decides that Levodopa levels are too high and continuation of treatment would be dangerous. Treatment is stopped. Dr. Stone decides that Levodopa levels are too high and continuation of treatment would be dangerous. Treatment is stopped. Post-Condition Post-Condition Decision is made on an updated or sustained prescription Decision is made on an updated or sustained prescription

Requirements Functional Functional The product shall display accurate Levodopa levels. The product shall display accurate Levodopa levels. Fit Criterion: The final analysis presented to the doctor shall be equivalent to the levels of Levodopa in the bodily sample taken from the patient. Fit Criterion: The final analysis presented to the doctor shall be equivalent to the levels of Levodopa in the bodily sample taken from the patient. Source: Goal #1 Source: Goal #1 The product shall require a bodily sample to analyze. The product shall require a bodily sample to analyze. Fit Criterion: The product will not begin analysis until a bodily sample has been provided. Fit Criterion: The product will not begin analysis until a bodily sample has been provided. Source: Goal #1 Source: Goal #1

Requirements The product shall archive the history of Levodopa levels. The product shall archive the history of Levodopa levels. Fit Criterion: After each measurement, collected data shall be stored in a data storage system. Fit Criterion: After each measurement, collected data shall be stored in a data storage system. Source: Goal #1. Archived data is required to create an accurate measurement. Source: Goal #1. Archived data is required to create an accurate measurement.

Requirements Non-Functional Non-Functional The product shall comply with all FDA regulations. The product shall comply with all FDA regulations. Reason: If the product does not comply to FDA regulations, it cannot be sold in the United States. Reason: If the product does not comply to FDA regulations, it cannot be sold in the United States. Source: Stakeholders Source: Stakeholders The product shall not infringe on any existing or pending patents. The product shall not infringe on any existing or pending patents. Reason: Illegal to break patents in the U.S., the device must be patentable to protect the clients interests. Reason: Illegal to break patents in the U.S., the device must be patentable to protect the clients interests. Source: Stakeholders Source: Stakeholders

Requirements The product shall comply with IEEE electronic standards. The product shall comply with IEEE electronic standards. Reason: Aids future maintenance by a third party as the device conforms to pre-existing and widely recognized standards. Reason: Aids future maintenance by a third party as the device conforms to pre-existing and widely recognized standards. Source: Stakeholders Source: Stakeholders

Conclusion Project Purpose Accomplished: Completed the SRS form Project Purpose Accomplished: Completed the SRS form Knowledge Learned: Knowledge Learned: The process for finding requirements The process for finding requirements All information required to write an SRS All information required to write an SRS Handling communication with an outside group Handling communication with an outside group How to build and refine requirements from the ground up, and check them against their intentions How to build and refine requirements from the ground up, and check them against their intentions