Module 4: Project - Technology Selection and Desi

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TECH460Module4ProjectSample1.pdf

TECH460 Module 4

Technology Selection and Design

Rubric

Criteria Total Include problem statement from previous deliverable 10 Identification of two alternative technologies 20 Qualitative analysis of technologies 20 Quantitative analysis of technologies 20 Technology selection and justification 40 High-level design 40 Total 150

Problem Statement

• Support Fitbit’s addition of a blood pressure monitoring capability through design of a web and mobile app user interface with the following features: • Display blood pressure readings numerically and graphically

• Track changes over time

• Identify low/high readings and trends that may indicate health concerns

Alternative Technology Approaches

• New Progressive Web App (PWA) • Single blood pressure monitoring app for all platforms (web, iOS, Android)

• Separate from existing Fitbit apps

• Linked from existing Fitbit website

• Single codebase implemented in HTML, CSS and JavaScript

• Website plus platform-specific extensions to existing apps • Web interface using HTML, CSS and JavaScript for browser access only

• Extensions to existing Fitbit apps implemented in native code • iOS: Swift/Objective-C

• Android: Java

Source: Google Developers, 2020.

Qualitative Analysis

• Progressive Web App (PWA) • Advantages

• Faster development time • Reduced development cost • Reduced maintenance cost • Greater consistency across platforms

• Disadvantages • Unable to integrate with existing

mobile apps • Not visible in standard app stores • Limited user interface options • Limited access to native device

features

• Website plus platform-specific extensions to existing apps • Advantages

• Can integrate BP monitoring feature into existing apps

• Fuller range of user interface options • Full access to native device features

• Disadvantages • Separate development required for

each platform • Higher development time and cost • Higher maintenance cost • Risk of inconsistency across

platforms

Source: Moqod, 2019.

Quantitative Analysis

• Estimated development cost for PWA: $17K - $20K

• Estimated development cost for website plus platform-specific apps • Website: $17K - $20K • Android: $17K - $20K • iOS: $17K - $20K • Total $51K - $60K 3x higher cost due to separate development for each platform

• Estimates based on Crowdbotics software development cost calculator with the following inputs: • Partial wireframes developed • Moderate visual appearance customization • Medium complexity • HIPAA compliance for health data • Pro developers (not necessarily USA-based) • 1 API integration • Regular updates • Moderate support level

Recommended Solution

• Website plus platform-specific extensions to existing apps

• Justification • Integration with existing Fitbit apps is top priority

• Users will not want to download a separate app just for BP monitoring

• Users will want to view BP data in context with other health and fitness data

• Value of integration justifies higher development and maintenance costs

High-Level Design – Data Flow

Current BP data from sensor

BP data received from wearable

Manually entered BP data

Collected/processed BP data for display

Manually entered BP data

Collected/processed BP data for display

Fitbit Cloud

Wearable device with BP sensor Android or iOS

smartphone

User laptop or desktop

Fitbit app w/ BP

extension

Fitbit web app in browser

High-Level Design – User Interface

Systolic

Diastolic

Systolic

Diastolic

Level

110 70

Normal

< Back

Return to main app/website menu

Add manual entry – brings up entry form as overlay

Graph of historical readings

Current reading

Color-coded level for current reading based on ACC/AHA

guidelines (CDC, 2020)