Feasibility Evidence Description (FED)

Transcription

1 Feasibility Evidence Description (FED) Real Estate Investment and Review Tool Team - 02 Venkata Sravanti Malapaka Project Manager, Software Architect Yuxuan Chen Prototyper, Developer, Trainer Yonghyun Cho Requirements Engineer, Developer Md Shadman Rafid Operational Concept Engineer, Trainer Shriraksha Rao Feasibility Analyst, Trainer Vikram Mudaliar Life Cycle Planner, Software Architect José Gabriel Vicente Hernández IV and V, Tester Webber Wang Tester, Quality Focal Point 10/22/2018 FED_DCP_F18a_T02_V1.3 i Version Date: 10/22/18

2 Version History Date Author Version Changes made Rationale 09/29/18 SR 1.0 Initial draft of Section 1 and Section 5 of FED Initial draft 10/06/18 SR 1.1 Documenting on Section 2 Initial Draft 10/14/18 SR 1.2 Completed Section 3 and part of Section 4 10/22/18 SR 1.3 Completed Section 1 to Section 5 and revised the document as necessary Initial Draft Final version for DC Package FED_DCP_F18a_T02_V1.3 ii Version Date: 10/22/18

3 Table of Contents Feasibility Evidence Description (FED)... i Version History... ii Table of Contents... iii Table of Tables... iv Table of Figures... v 1. Introduction Purpose of the FED Document Status of the FED Document Business Case Analysis Cost Analysis Benefit Analysis ROI Analysis Architecture Feasibility Level of Service Feasibility Capability Feasibility Evolutionary Feasibility Risk Assessment NDI/NCS Interoperability Analysis Introduction Evaluation Summary FED_DCP_F18a_T02_V1.3 iii Version Date: 10/22/18

4 Table of Tables Table 1: Personnel Costs... 3 Table 2: Hardware and Software Costs... 4 Table 3: Benefits of Real Estate Investment and Review tool System... 4 Table 4: ROI Analysis... 5 Table 4.1: ROI Analysis based on the dollars as a unit of measurement for Cost and benefit... 5 Table 5: Level of Service Feasibility... 7 Table 6: Capability Requirements and Their Feasibility Evidence... 8 Table 7: Evolutionary Requirements and Their Feasibility Evidence Table 9: Risk Assessment Table 10: NDI Products Listing Table 11: NDI Evaluation FED_DCP_F18a_T02_V1.3 iv Version Date: 10/22/18

5 Table of Figures Figure 1: ROI Analysis Graph... 5 FED_DCP_F18a_T02_V1.3 v Version Date: 10/22/18

6 1. Introduction 1.1 Purpose of the FED Document The purpose of Feasibility Evidence Description is to provide the evidence that the Real Estate Investment and Review tool is feasible and satisfy all the requirements specified in the Win-Win agreements; this is accomplished by taking into consideration several success-critical stakeholders. The main objective of FED is to show that the project satisfies the requirement (Level of service, capability and interface), be achievable within the budget and schedules in plan, determine realistic return of investment, and mitigate all the risk using risk management plan. The conclusion is drawn from the sections Business Case, Architecture Feasibility, Risk Assessment and NDI/NCS Interoperability Analysis that the project is feasible now and the later stage of the document. 1.2 Status of the FED Document The status of the FED is currently at version 1.3, where 5 sections of the document are created to be uploaded with the DC Package. FED_DCP_F18a_T02_V1.3 1 Version Date: 10/22/18

7 2. Business Case Analysis Assumptions 1. The users are technically sound in using the website to track investment and look for service provider 2. Real Estate market trend is in inclination now and for the upcoming year 3. Users willingness to leave review for the Service Provider Stakeholders Initiatives Value Propositions Beneficiaries 1. Investor (Registered/ Unregistered) 2. Service Provider a) Real Estate Agent b) Manager 3. Developer 4. Maintainer 5. Administrator Cost Person Costs Hosting costs Server Costs Maintenance Costs 1. Develop the website by determining the usability from the stakeholder 2. Build UML model for review and tracking investment, which could be used as a reference during system development 3. Obtain review and investment from the Registered user of the Website 1. Easy access to trustworthy Service Provider from other State based on User review 2. Provide tool for tracking investment and evaluate properties 1. Users (Real Estate Investor Registered/Unregistere d) 2. Service Provider a. Real Estate Agent b. Manager 3. Client Benefits (Key performance indicators KPIs) 1. The Investors will track their investment on a excel sheet which could be cumbersome; thus, using this website to track investment will eliminate extra effort of maintaining an excel sheet 2. The Service provider can use this tool to Maintain a profile amongst the authorized list of Service provider and increase their business productivity 3. The User (Registered/Unregistered) can use this tool to determine truth worthy Service Provider out of state while eliminating risk, uncertainty, and save time FED_DCP_F18a_T02_V1.3 2 Version Date: 10/22/18

8 2.1 Cost Analysis Personnel Costs In order to determine the cost associated with the project development we used the average cost per hour from the link given below. The average salary for a web developer is $20.34 per hours There are 2 columns that determine the time spent in hours and dollars as a form of measurement Activities Table 1: Personnel Costs Development Period (12 weeks) Exploration Valuation and Foundation Phase: Time Invested: 6 weeks Client Meeting (In person or Slack): 1hr/week * 6 week Win-Win Negotiation Session: 2 session * 1hr Prototype Presentation: 1 session * 0.5hr Team General Meeting: 3hr/week * 6 week FCR Architecture Review Board: 1session * 1.5 Development and Operation Phase: Time Invested: 6 weeks Client Meeting (In person or Slack): 1hr/week * 6 week Team General Meeting: 3hr/week * 6 week Development: 13.5hr/week * 10 week * 1 person CCD session: 1 session *1.5hr DCR ARB: 1 session *1.5hr Deployment of the System in Operation Phase and Training Installation and Initial Set up: 2hr * 1 time *1 person Training: 2hr * 1 times *1 person Time Spent (Hours) Time Spent (Dollars) Total Time Spent Maintenance Period (1 year) Maintenance: 1hr/week * 52 weeks Total FED_DCP_F18a_T02_V1.3 3 Version Date: 10/22/18

9 2.1.2 Hardware and Software Costs Table 2: Hardware and Software Costs Type Cost Rationale Development Cost $0 Used AngularJS, GraphQL, node.js, Prisma Cloud, and chart.js which are all free of cost Maintenance Cost $0 No anticipated Maintenance Cost during initial phase of the website Hardware Cost Web Hosting (Domain Registration) $12/yr. Google Domain uses the same infrastructure as Google itself, as a result of which it could be accessed faster Hardware Cost - Web Server $0 Google App Engine Free trial version will be used during this phase of development 2.2 Benefit Analysis For the benefit analysis we take into consideration Non-financial benefit and costs associated with the project. Additionally, the benefit analysis will include non-monetary benefit like reliability, experience and visual representation. In the benefit analysis we converted non-financial benefit, such as Increase in time efficiency, elevation in advertisement, reliability, experience and representation (statistic and chart) into financial benefit for Return On Investment calculation. Table 3: Benefits of Real Estate Investment and Review tool System Current activities & resources used User Increase in time efficiency to search Service Provide either by location or by other search criteria (1hr * 52 weeks) Elevation in advertisement for the Service provider (0.5 * 52weeks) User Increase reliability in using the website to determine authorized Service Provider (0.5* 52 weeks) % Time Saved Reduce (Hours/Year) Quantitative Benefit Time Saved (dollars/year) Qualitative Benefit FED_DCP_F18a_T02_V1.3 4 Version Date: 10/22/18

10 Increase on service provider experience (learning curve) based on the feedback obtained from its client's reviews (0.5 * weeks) Easier visual representation of Investment for Investor (0.5hr * weeks) Administrator Easier to view website and investment statistic (0.5hr * weeks) Total ROI Analysis The year 2018 is considered to be Development period and yet to have any benefits. The time spent by the team for developing Real Estate Investment and Review Tool website is 194 hours, which includes the time the team spend in negotiating with the client, meeting, developing, and presenting. Year 2019, 2020 and 2021 are considered to be maintenance period where in there will be an increase in hour by 10% annually. In the Table 4.1, the server cost is added to the initial cost from the development to determine the ROI, so there is slight variation in the ROI values in terms of decimal Table 4: ROI Analysis Year Cost Benefit Cumulative Cumulative (Effort Saved) Cost Benefit ROI ( ) (0.200) (0.491) Table 5.1: ROI Analysis based on the dollars as a unit of measurement for Cost and benefit Year Cost Benefit Cumulative Cumulative (Effort Saved) Cost Benefit ROI 2018 ( ) = ( ) (0.1969) (0.488) FED_DCP_F18a_T02_V1.3 5 Version Date: 10/22/18

11 Figure 1: ROI Analysis Graph From the chart shown in the figure 1, we can determine that we can get the return on investment within 2 years from now, or in This is considered as the break-even point where ROI value is equal or almost nearer to value 0, in other words amount of cost is equal to the amount of benefit (returned value) for year. FED_DCP_F18a_T02_V1.3 6 Version Date: 10/22/18

12 3. Architecture Feasibility 3.1 Level of Service Feasibility Table 6: Level of Service Feasibility Level of Service Requirement LOS-1: Usability - The system should display Investor s investments in 3 seconds LOS-2: Performance The system shall handle multiple APIs requests within 4 seconds LOS-3: Responsive - The system should be rendered properly on various browsers (non-ie browser: Google Chrome - Latest Version: 68, Mozilla Firefox - Latest Version: 61, Safari - Latest Version: 11.1.) and devices LOS-3: Usability - The system should provide the graphical representation of the Investment over time LOS-4: Performance - The System should be able to support 100 users using the system simultaneously Product Satisfaction Product Strategies: GraphQL and Chart.js Process Strategies: GraphQL can combine multiple query into 1 request and cache the data in the browser so the further data can be read from the cache within seconds Analysis: Using GraphQL to retrieve data makes chart.js to display data faster Product Strategies: Node.js Process Strategies: Node.js has non-blocking IO system that allows to process numerous concurrent requests Analysis: The usage of Node.js as a backend runtime environment allows the system to handle each of the request within seconds Product Strategies: Angular Material Process Strategies: Angular Material will increase the look and feel of the website on different platform and browser Analysis: Various users may use different browser or device to login to the system, so responsiveness is very important. With the help of Angular Material, the website can be used by users on multiple device, which is a basic tendency of the user Product Strategies: GraphQL, Chart.js Process Strategies: GraphQL can combine multiple query into 1 request and cache the datas in the browser Analysis: This feature of GraphQL makes the data extraction and representation of the data in visual format better using chart.js Product Strategies: Node.js Process Strategies: Node.js will handle multiple simultaneous request and delegate execution of request to separate component and hinders the delay Analysis: Node.js when used will help the system to serve multiple customers simultaneously FED_DCP_F18a_T02_V1.3 7 Version Date: 10/22/18

13 3.2 Capability Feasibility Table 7: Capability Requirements and Their Feasibility Evidence Capability Requirement CR-1: Locate/Search Service Provider CR-2: Login/Sign Up - using social media CR-3: View Service Provider s Profile CR-4: Write Review CR-5: Read Review Product Satisfaction Software/Technology used: GraphQL, Prisma Cloud, Angular Material, AngularJS, Prisma, Google App Engine Feasibility Evidence: Obtains the accurate Service provider based on their information store in Prisma Cloud DB using GraphQL and display using Angular Material. This capability is termed to be feasible because the GraphQL acts as a connect to Prisma cloud to determine the content based on the matching field data Referred use case diagram: UC-3 and UC-16 Search for Service Provider Software/Technology used: Social media APIs Facebook and Google Sign In, GraphQL, Prisma Cloud, Angular Material, AngularJS, Prisma, Google App Engine Feasibility Evidence: Develop a prototype to determine the feasibility of third- party system login. Prior to integration of the modules, check if the incorporation of the APIs works as desired by having initial tests with the users Referred use case diagram: UC-11, UC-32 Login and UC-1, UC-33 Sign Up Software/Technology used: GraphQL, AngularJS, Prisma Cloud, Prisma, Google App Engine Feasibility Evidence: GraphQL will determine the appropriate data from Prisma Cloud based on the query given and combines the result into one and store in the browser for later use and display using AngularJS. Feasible because GraphQL is a connector to Prisma Cloud the website. Referred use case diagram: UC-4, UC-15 View Service Provider s Profile Software/Technology used: GraphQL, AngularJS, Prisma Cloud, Prisma, Google App Engine Feasibility Evidence: Determining if the review content is appropriate to the specific Service provider using prototyping and also check for max characters allowed Referred use case diagram: UC-22 Write Review Software/Technology used: GraphQL, AngularJS and Prisma Cloud, Prisma, Google App Engine, GraphQL Feasibility Evidence: Prototyping if the review obtained from the query is appropriate for the required Service provider. Based on the review read selection for a Service Provider, the GraphQL queries the database to determine the review of the appropriate person FED_DCP_F18a_T02_V1.3 8 Version Date: 10/22/18

14 CR-6: Two-Factor Authentication CR-7: View statistic CR-8: Compare Property CR-9: View all Service Provider CR-10: Share Service Provider Profile CR-11: Track Investment Referred use case diagram: UC-5 Read Review, UC-23 Read Review Software/Technology used: Speakeasy two-factor authentication for node.js, Prisma, Prisma Cloud, GraphQL Feasibility Evidence: Prototyping if the website is able to send notification to the mobile device for verification. It is well-tested and includes robust support for custom token length and Hash algorithm SHA256 and SHA512 Referred use case diagram: UC-29 Two-factor Authentication Software/Technology used: GraphQL, AngularJS, Prisma, Prisma Cloud, Google App Engine Feasibility Evidence: Query the database to obtain the data to be displayed in the web page. All the components are interoperable with each other and determine the necessary output, for feasibility we develop the initial version with few features to check for interoperability Referred use case diagram: UC-42 View Statistic Software/Technology used: GraphQL, AngularJS, Prisma Cloud, Prisma, Google App Engine Feasibility Evidence: GraphQL is used to retrieve property details and compare using simple math. AngularJS is used to provide the front-end view of the comparison. The query language and the framework compatibility can be determined by prototyping Referred use case diagram: UC-19 Compare Property Software/Technology used: GraphQL query, AngularJS, Prisma, Google App Engine, Prisma Cloud Feasibility Evidence: GraphQL is one of the connectors that is used to query Prisma Cloud database to display the list of Service Provider using AngularJS, a front-end framework Referred use case diagram: UC-12 View all Service Providers Software/Technology used: GraphQL, AngularJS, Prisma Cloud, Social Media API, Prisma, Google App Engine Feasibility Evidence: GraphQL is one of the connectors that is used to query Prisma Cloud database to display the Profile of Service Provider using AngularJS, a front-end framework. The profile obtained can be imported/shared using social media, prototyping the integrity of the technologies serve as an evidence Referred use case diagram: UC-6 Share Service Provider s Profile Software/Technology used: GraphQL, AngularJS, Prisma Cloud, Prisma, Google App Engine Feasibility Evidence: GraphQL is one of the connectors that is used to query store the data obtained from the Front-end to database for further analysis Referred use case diagram: UC-20 Track Investment FED_DCP_F18a_T02_V1.3 9 Version Date: 10/22/18

15 CR-12: Export tracking data CR-13: notification CR-14: Like/Dislike Review CR-15: Read Blog CR-16: Write Blog CR-17: Share Blog Software/Technology used: Prisma Cloud, JSON2CSV, Prisma, Google App Engine Feasibility Evidence: Prototype the exporting functionality by deploying the initial data (Link: ) Referred use case diagram: UC-12 Export tracking data Software/Technology used: SendGrid, GraphQL, Prisma Cloud, Prisma, Google App Engine Feasibility Evidence: GraphQL used to query database to obtain the recipient s address and SendGrid is used to communicate the same. Create an initial working prototype to check if the system works as expected Referred use case diagram: UC 10 Contact Service provider via Software/Technology used: AngularJS, Prisma Cloud, Prisma, Google App Engine Feasibility Evidence: We use AngularJS to determine the count of like and dislike and store it in the Prisma Cloud. Prototype the feature to determine the feasibility Referred use case diagram: UC 27 Like or dislike reviews Software/Technology used: WordPress, Google App Engine, Google Cloud SQL Feasibility Evidence: WordPress a content management Software that is used to post to the blog. Determine the prototype to check if the contents are readable using WordPress Referred use case diagram: UC 8 Read Blog Software/Technology used: WordPress, Google App Engine, Google Cloud SQL Feasibility Evidence: WordPress a content management Software that is used to post to the blog. Determine the prototype to check if the contents are writable and match the desired limitations using WordPress Referred use case diagram: UC 40 Write Blog Software/Technology used: WordPress, Social Media API, Google Cloud SQL, Google App Engine Feasibility Evidence: Prototype the initial working of sharing a blog using WordPress with social media plugin ( Referred use case diagram: UC 9, UC 17 Share Blog CR-18: Comment on Blog Software/Technology used: WordPress, Google App Engine Feasibility Evidence: WordPress a content management Software that is used to post to the blog. Determine the prototype to check if the blog is allowed to comment Referred use case diagram: UC 28 Comment on blog CR-19: Moderate Site Software/Technology used: AngularJS, GraphQL, Prisma Cloud, Prisma, Google App Engine FED_DCP_F18a_T02_V Version Date: 10/22/18

16 3.3 Evolutionary Feasibility Feasibility Evidence: Based on the connectors available to Prisma Cloud, admin can modify the contents using AngularJS by prototyping Referred use case diagram: UC 43 Remove flagged/fake user UC 44 Delete inappropriate user content Table 8: Evolutionary Requirements and Their Feasibility Evidence Evolutionary Requirement ER-1: Discussion Board ER-2: Scalability Product Satisfaction Software/Technology used: Discourse or WordPress Feasibility Evidence: Prototype the interoperability of Discourse with our website functionality. Determine the most feasible Software based on the prototype functionality ( Referred use case diagram: UC-25 Start Discussion, UC-26 Read discussion Software/Technology used: Google App Engine Feasibility Evidence: This website has a probability of being deployed to the Google App Engine platform for seamless scaling of the website. Referred use case diagram: <Not applicable> FED_DCP_F18a_T02_V Version Date: 10/22/18

17 4. Risk Assessment Risks Update and Upgrade to the APIs after the integration Scalability: Expansion of the website user s investment and personal data Potential Magnitude Table 9: Risk Assessment Risk Exposure Probability Loss Risk Exposure Risk Mitigations Risk Avoidance: Check the API changelog to see which object will be structured differently. Update the code to handle both old and new version each with objects. Change the version of the test and validate that your code works for the new structure Buying information: Hosting the website on Google App Engine which scales as the number of users increases Data privacy and security Risk Avoidance: Determine the appropriate security software that can be used to protect the user s information. Educating the maintainer on the security aspect involved in the website and frequently updating the encryption algorithm Reliability of the data from APIs Buying information: Comparing or verifying the data obtained from the API with the associated organization before publishing on the website Integration of COTS Risk Reduction: Developed a working model as a form of prototype to determine the interoperability of the COTS Uncertainty in usability requirement of the website from stakeholder Buying information: Determine the information on UX from the client and Users to update the website based on their feedback Development Schedule risk: Risk Avoidance: Based on the FED_DCP_F18a_T02_V Version Date: 10/22/18

18 Duration of development time time constraint for the development of the project create a schedule and progress the work to meet the anticipated deadline FED_DCP_F18a_T02_V Version Date: 10/22/18

19 5. NDI/NCS Interoperability Analysis 5.1 Introduction COTS / GOTS / ROTS / Open Source / NCS Table 10: NDI Products Listing NDI/NCS Products AngularJS Angular Material GraphQL Node.js Chart.js SendGrid Google App Engine Prisma Cloud Speakeasy WordPress Google Sign In API Facebook API Google Places API Zillow API Prisma Ultimate Social Media Icons Purposes JavaScript Framework Reusable, well-tested, and accessible UI components Querying language for Prisma Cloud database Open Source Server environment JavaScript Charting Communication Platform for transactional and marketing Web Framework for hosting A GraphQL Database Platform Two-Factor Authentication Content Management System Login and Sign Up for unregistered user Login and Sign Up for unregistered user To obtain location information To determine the property price ORM for GraphQL For sharing blogs via social media Connectors In this project, we use GraphQL/Prisma Connector to enable GraphQL web application to retrieve and query data from Prisma Cloud database Additionally, we make use of external connectors to connect to various services that has to be rendered to the system: We use Zillow API as a form of connector to extract property price to our system based on the location obtained from our database We make use of SendGrid, a cloud-based delivery service to direct notification to the designated receiver, the recipient s address is fetched from the Prisma Cloud Database We use Places API from Google to determine the location information (response in the form of JSON or XML) using HTTP request from our system FED_DCP_F18a_T02_V Version Date: 10/22/18

20 Google Authenticator, a software token that implements two-step verification based on the device information of the user; obtained from the information stored in our database Google Sign-In API and Facebook API will act as a connector between the Google and Facebook account that helps the user to log in or sign up to the system and store the information for the later use (only sign up) Legacy System The Real Estate Investment and Review Tool website does not assimilate any legacy system or has no anticipation of integrating with any other system in near future. 5.2 Evaluation Summary Table 11: NDI Evaluation NDI Usages Comments AngularJS JavaScript open source Positive Point: framework For Front-end Large community & help Free, open-source Mature and well supported Great documentations Steep learning curve GraphQL Node.js Data query and manipulation language JavaScript runtime environment Large library size Positive Point: Reduces number of requests compared to REST Loose coupling between client and server Strong typing system integrates well with Typescript Great developer tools Steep learning curve Not as common as REST Positive Point: Easy & quick to setup Allows isomorphic application Good performance Lots of library support & integration Frequent API changes Unopinionated framework results in lack of standards FED_DCP_F18a_T02_V Version Date: 10/22/18

21 No multi-thread support Chart.js Charting for Investment Positive Point: Light weight and fast Responsive charts Supports multiple X and Y axes Limited feature WordPress A Content Management System for blog Positive Point: Ownership and control over the data Open source software to easily extend to add new feature Needs frequent updates Vulnerable to security aspects SendGrid Delivery of Positive Point: Cloud based service Master in sending s maintaining high speed Provides both the IP pools shared and dedicated Limited feature on receiving and processing the incoming Google App Engine Server Positive Point: Will automatically handle and balance all instance Automatically scale data storage Secure Internet Infrastructure Expensive (We use free quota for this phase of the project development) Prisma ORM for GraphQL Positive Point: Simplifies GraphQL server development Abstracts data access layer Reduces code written with code generator Auto query optimization Relatively new library Extra framework to learn Angular Material Material UI for Angular Positive Point: Easy integration with Angular Pre-built components out the box FED_DCP_F18a_T02_V Version Date: 10/22/18

22 Prisma Cloud Great documentation & support Difficult to modify theme A GraphQL Database Platform Positive Point: Powerful GraphQL backend High Performance <Not Applicable> Speakeasy Two-Factor Authentication Positive Point: Google Sign In API Facebook API Google Places API Login and signup for unregistered user Login and signup for unregistered user To get location information Generating QR code Obtaining Secret key Not completely resistant to malware attack Positive Point: More convenient for the user The API can pull in extra meta-data No control over login process Privacy concern Positive Point: More convenient for the user The API can pull in extra meta-data No control over login process Privacy concern Positive Point: Places search Place Autocomplete Zillow API To obtain Property Price Positive Point: Ultimate Social Media Icons Social media plugin which lets you add share icons Property Price information Determine the valuation range Update and Upgrade effects the working of the system Positive Point: Free plugin has a lot of offer Has option to all user to share a blog by Limited, so need to pay for additional add- FED_DCP_F18a_T02_V Version Date: 10/22/18

23 on No way to set a minimum for social share or follow counts FED_DCP_F18a_T02_V Version Date: 10/22/18