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Erl's SOA Chapter 2

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Erl's SOA Chapter 2

  1. 1. SOA Chapter 2 Case Studies
  2. 2. Case Studies • Case studies are developed for two organizations – RailCo Ltd. – Transit Line Systems • 125 examples related to the case studies are presented
  3. 3. RailCo Ltd • Parts supplier for railways • Specialized in airbrakes, tools • International sales 10%, Domestic 90% • Primary line of business: resale of parts • Secondary LOB: technician hire out for installations and repair
  4. 4. RailCo Ltd - History • Established: Early 90s • Staff has grown from 12 to 40 • Started as a brokerage for wholesalers • Specialized in air brakes • Became a wholesaler by dealing directly with air brake parts manufacturers
  5. 5. RailCo Ltd – Technical Infrastructure • Five employees and one manager dedicated to full-time IT duties • Maintain client workstations and back-end servers • Custom development is outsourced • Periodic upgrades and maintenance is in- house
  6. 6. RailCo Ltd – Automation Solutions • Two-tier client server for all accounting and inventory control • Two administrative clerks feed this solution with transaction document data (purchase orders and invoices) • Receipt and submission of these documents initiates corresponding inventory receiving and order shipping processes
  7. 7. RailCo Ltd – Automation Solutions • A contact management system in which customer and business partner profiles are maintained • Consists of a database fronted by web- based data entry and reporting interfaces • Users: managers, admin assistants, accounting personnel
  8. 8. RailCo Ltd – Situation,Business Goals, Obstacles • Profit margins are declining • Business process overhead is limiting the ability to be competitive • Clients are switching to another company providing same products more efficiently • Competitor has implemented a B2B solution for certain transactions online • RailCo’s primary client, Transit Line Systems has started an online relationship with the competition
  9. 9. RailCo Ltd – Situation,Business Goals, Obstacles • Outdated technology must be overhauled • Must upgrade its automation environment • Top priority: participate in online transactions with TLS • RailCo has hurriedly built a pair of Web services that connect it with the existing TLS B2B solution
  10. 10. RailCo’s Initial Web Services Invoice Submission Service Order Fulfillment Service
  11. 11. Transit Line Systems • Prominent corporation in private transit sector • Employs over 1800 people, offices in 4 cities • Primary Line of Business: providing private railroad transit • Secondary LOB: – Maintenance and Repair, outsourcing technicians – Parts manufacturing for other businesses – Tourism branch that partners with Airlines and Hotels
  12. 12. Transit Line Systems - History • Existed as a mid-size corporation centered around a single private railway • The bankruptcy of a competitor sparked an era of growth and acquired two other private railways • Over 10 years a made a series of acquisitions: – G&R Tracks, Ltd. – private railway.
  13. 13. Transit Line Systems - History • Over 10 years a made a series of acquisitions: – G&R Tracks, Ltd. – private railway, provided TLS with enough rail assets to launch a new railway in a neighboring city. Reduced G&R employees from 180 to 10 – Sampson Steel, Corp.- manufacturing plant that produced parts for clients in automobile and airline industries. TLS acquired Sampson when it was on the brink of liquidation. TLS partners with Sampson who now produces parts and assembly for TLS. Sampson management still runs the company
  14. 14. Transit Line Systems – Technical Infrastructure • Large IT department of 200 professionals. 50% of staff are contractors hired on a per-project basis • Contemporay eBusiness solutions are hosted in a clustered server environment • High transaction volume, robust backup and disaster recovery • Legacy systems are isolated. Mainframes and Windows servers house older, specialized client- server applications and databases
  15. 15. Transit Line Systems – Automation Solutions • Legacy systems – Distributed enterprise accounting solution for 400 users. Partially custom developed, but mostly out-of- the-box accounting features. Sophisticated front- ends for intranet and remote access. Vendor offers Web service adapters – Third party time tracking system used by employees that are outsourced to record time spent at client sites. Information is manually entered into accounts receivable
  16. 16. Transit Line Systems – Business goals and obstacles • TLS has undergone much change. • The IT department has dealt with a volatile business model and regular additions to its solutions. • Riddled with custom developed applications and third-party products • Cost of business automation has skyrocketed
  17. 17. Transit Line Systems – Business goals and obstacles • Integration of systems is complex • Maintenance of solutions is expensive • Complexity of systems and inflexibility have slowed IT response time to business process changes • IT directors have decided to adopt SOA as the standard architecture for new solutions • SOA will be used to unite legacy systems
  18. 18. Transit Line Systems – Business goals and obstacles • TLS has already built its first SOA solution • B2B system to which RailCo and other vendors connect to conduct transactions online
  19. 19. TLS – B2B Solution Accounts Payable Vendor Ledger Profile Service Purchase Order Internal Notification Policy Load Balancing

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