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Course Introduction SWEN-343 Welcome Goals for the Course Prepare you for real world Be ready to work with diverse systems Diverse teams Work with teams (intra team) Create & Maintain Enterprise apps How is this course different!? What

  1. Course Introduction SWEN-343

  2. Welcome

  3. Goals for the Course Prepare you for real world Be ready to work with diverse systems Diverse teams Work with teams (intra team) Create & Maintain Enterprise apps

  4. How is this course different!?

  5. What I Expect Open & Honest discussions How do you learn best Speak up We can cover things not on syllabus

  6. Course Resources Mycourses Homeworks Project Deliverables Put things in the right dropbox => “Assignments” “Surprise” quizzes (Tech Blitz and/or team “Research”)

  7. Texbook Fowler’s PEAA BUY IT!

  8. Grading Grading outline is on course website Reserve right to tweak at any time

  9. Office Hours Where do I find them? When should you reach out?

  10. Course Website (one-stop-shop) http://www.se.rit.edu/~swen-343/

  11. Project Teams ~6 teams Formed over the weekend A survey will be made available – follow mycourses link

  12. Enterprise Systems SWEN-343

  13. Lecture Objectives  Understand what characterizes a system as an “enterprise system”  Provide an architectural perspective of an enterprise system  Begin to look at typical architectural patterns that address the needs of an enterprise information system  Begin to plant design structure concepts and approaches into our thinking ❖ We will revisit and evolve this over the term

  14. Enterprises?

  15. What does it mean to be “Enterprise”? “Enterprise software is an overarching term for any software used in large organizations (whether business or government). It is considered to be an essential part of a computer-based information system, and it provides business-oriented tools such as online payment processing and automated billing systems.” - Just one definition

  16. Not just a large application with lots of data and code Can be a small app - 1 class Not typical

  17. What does it mean to be Enterprise? ➔ Not GUI over DB (GoD) Complex data , and lots of it Complex functionality , and lots of it Business rules and logic that fail all test of logical reasoning Perceptual integration of legacy and evolution to “next” generation Applications are important to the business: mission critical (ilities) Lots of quality requirements: scalability, security, availability, performance, integratability, etc.

  18. What does it mean to be Enterprise? Examples Company human resources, investment and cost analysis, credit scoring, insurance processing, supply chain management, customer sales and service, health information systems, cost accounting and reporting, business data analysis, etc. Non-examples automobile engine control, word processors, elevator controllers, chemical plant controllers, telephone switches, operating systems, compilers, games , etc.

  19. Characteristics of Enterprise Apps Hundreds of inter-related classes and data tables with complex flow logic Persistent data Shared between separate applications/modules, often in different companies Across program runs Often persistent for years Highly structured ← → Unstructured Concurrent, distributed access by multiple types of users Lots of user interaction screens for each type of user Lots of data in disparate data sources Gigabytes is a modest system Terabytes/Petabytes is common

  20. Enterprise != Just for business Enterprise != Large application Enterprise != “Boring” application Enterprise = Needs of organization vs. person Enterprise = Aspect of information system

  21. Design Challenges “ technologeeks ”, Too often, as technologists , we get enamored with the technology (.NET, Java Enterprise Edition, AJAX, Ruby on Rails, Node, Web Services, etc.) and we think that is what makes our applications complex /cool/top-notch/best-in breed We over-engineer and under-engineer our systems ERP software is no different, but often magnified -> No silver bullet, but one of the goals of the course is to address this.

  23. Other Typical Challenges Long lasting Cannot just re-write everything Must live with bad decisions How can you predict where you will be in 5 years? Death march style projects Diverse technology Lots of moving parts How do these challenges affect Your design? Development? Other areas?….

  24. What we will cover in this class ERP Architecture Organization issues Maintenance Procurement Enterprise & the cloud Devops Legacy Integration

  25. Quiz - Enterprise or Non-Enterprise? Sublime (text editor) Your 261 Django/Spark application Sales management system Slack iPhone messaging app

  26. Quiz - Enterprise or Non-Enterprise Sublime (text editor) Your 261 Django/Spark application Sales management system - Yes Slack - Yes iPhone messaging app - Could be PART of one

  28. 2019

  31. IDC:Worldwide Enterprise Storage Market Sees Decline in 4Q

  33. 2009

  34. 2016

  35. 2017

  36. 2018

  37. 2019

  38. HP, Dell are winners in disk storage shipped in Q3 December 7, 2014 “IDC said the total worldwide disk storage systems factory revenue grew 5.1% year over year to nearly $8.8bn during the third quarter of 2014 . Total disk storage systems capacity shipped was 25 exabytes. New capacity shipments grew 42% year over year during the quarter.” - ITEuropa

  39. Worldwide Enterprise Storage Market Sees Decline in Fourth Quarter March, 2017 Flash-Based Storage Systems Highlights The total All Flash Array (AFA) market generated almost $1.7 billion in revenue during the quarter, up 61.2% year over year. The Hybrid Flash Array (HFA) segment of the market continues to be a significant part of the overall market with $2.5 billion in revenue and 38.4% market share.

  40. Information Environment [Chorafas, Enterprise Architecture and New Generation Information Systems ]

  41. Islands of Automation or Application Silos Enterprise Business Intelligence (BI) Application Supply Chain Integration (EAI) Customer Relationship Human Resources (HR) Management (CRM)

  42. Layering A core concept of ERP Be thinking about this as you design your project How does it affect coupling & cohesion?

  43. What is Layering? Break apart complicated software systems. Layered almost like a cake/soil strata Each layer rests on top of another layer

  44. Activity (post-individual assignment) In self formed teams of 3-5, create a short jingle/rap/poem about “Enterprise Software” Some points you may focus on include: What is it What is it not What are some examples Use internet/books. What separates “Enterprise” from just another large application?

  45. Layers Where else have you seen this? Services provided by lower layers are used by those above.

  46. Why layers? Why are they important in Software Engineering?

  47. Principle Layers Presentation Domain/Business Logic Data

  48. Layering Drawbacks Cannot properly encapsulate everything. Could harm performance/complexity. Difficult to decide what layers to have, and what each should be responsible for.

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