ISTP Presentation - Final

8/2/2019 ISTP Presentation - Final

1/22

ISTP 5

Individual Presentation by S. Sabraz Nawaz

Individual Presentation

on

Tech n o logies fo r Deve lop in g Sys tem s

I n f o r m a t i o n S ys t e m s T h e o r y a n d P r a c t ic e 5 3 1

L e ct u r e r i n c h a r g e :

Dr. Samantha Thelijjagoda

P r e s e n t e d b y :

S. Sabraz Nawaz

PGM-IS-12-0007

Technologies for Developing Systems Foundations of Systems Development

o Structured Development

o Fourth-Generation Languages

o Software Prototyping

o Computer-Aided Software Engineering (CASE)

o Object-Oriented Development

o Client-Server Computing

System Integrationo ERP Systems

o Middleware

Inter-organizational System Development Internet-Based Systems

o Application Servers

o Java

o Web Services

Individual Presenta tion by: S. Sab raz Nawa z 2


2/22

ISTP 5


Agenda Case Discussion

o System Integration

o Inter-organizational System Development

o Internet-Based Systems

Question and Discussion


System Integration One of the major challenges for CIOs

o Comp lex an d expensive: systems from different technologies to be

integrated

o Risk y ; systems may crash

Can be done in different approaches;

o DBM S: data oriented view to integration; common database e.g., Oracle

o ER P: application view of integration, applications can communicate (e.g.,

SAP)

o Middlew are : applications communicate via third party software



3/22

ISTP 5


ERP Systems ERP provides the means to integrate businessdepartments and functions across an organization

o Single vend or (e.g. SAP)

o Single set of applications

o Single database

If properly installed, the ERP systems will return

considerable payback

Many successes and failures


Colgate PalmoliveCase Example for ERP Systems



4/22

ISTP 5


Colgate Palmolive 200 years old consumer product leader Decentralized structure with national or regional control

in 200 countries


Colgate Palmolive: Problem Decentralized structure;

o In dependent operat ion s; expensiv e to coord inat e

o Slow response to m arket changes

o Constrained company growth

Competitive crisis in the mid-1990s, and complexdecentralized IT infrastructureo Coordination p roblem s

o Sales dropped

o Dep rived firm gr ow th



5/22

ISTP 5


Colgate Palmolive: Strategy Management needed to

to centralize the structure

develop new products

reduce product delivery cycle

reduce cost of operations

Integrate the supply chain in 80 countries; reduce the

cost by $150million

Integrate the distribution in 200 countries


Colgate Palmolive: Solution

Implemented SAP R/3 system to integrate

worldwide operations, across business functions

o S&D, MM, HR, and Finance modules

Took 5 years and $430 million to complete



6/22

ISTP 5


Colgate Palmolive: Outcome Saved $50 million and $100 million in first twoyears

o Savings allocated R&D for new products

o 60% reduction in product delivery cycle

o Improved cooperation amongst regional subsidiaries andsuppliers

o Regained number one market position for toothpaste inUS after 34 years


Covered System Integration

Inter-organizational System Development

Internet-Based Systems



7/22

ISTP 5


Inter-organizational System (IOS)

Development IOSs that connect organizations; if in two or more

countries, then called Global Information System

Main business trend is business ecosystems; groupings

of businesses that w ork closely

o This trend affect the way systems are built; Supply chain m anagement

systems (SCM)

o Another type of IOS is Platform which provides infrastructure for the

operation of a business ecosystem or an industry

Exam ple: Am erican Air lines SA BRE reserv at ion sy stem


A Sample IoS

Source: Information Technology for Management, by Efraim Turban



8/22

ISTP 5


Hong Kong Exchanges andClearing (HKEx)

Case Example for IOS Development


HKEx Asias second and worlds ninth largest stock market

Stock markets globalized

o Investors are demanding and need more features; faster, cheaper and secure

trading

Automatic order Matching and execution System (AMS)

handled security trading

o AMS/1

o AMS/2



9/22

ISTP 5


HKEx: Problem AMS/1o First generation system

o A closed system; allowed brokers to enter orders but from special terminals fromHKExs trading floor

AMS/2o Second generation system

o Allowed orders from dedicated terminals in brokers offices

o Didnt connect external networks nor other computers of 500 brokers

Wanted;o an open architecture to reach market beyond Honk Kong

o To interconnect business partners systems


HKEx-Solution: AMS/3 Open up the system to individual investors

Improve the efficiency and competitiveness by

integrating the system to enable End to End trading

process;

o Investors BrokersMarket



10/22

ISTP 5


Development of AMS/3 A daunting project;o Consumed 40 staff, 150 consultants and 500 brokers

o Took 02 years to complete

o Five development teams

Network, Open Gateway, Multi-workstation system,

Order routing system and User acceptance testing


Development of AMS/3 (Cont.)

Each week project management reported to project steering

committee

Trading and Settlement Committee consisting of stakeholders

o Review ed t he d evelop m ent

o Offered opinions

During the 02 years, HKEx kept on dialoging with interested

partieso En sured they accep t t he s yst em

o Got ideas to im prove the syst em

o Used media to educate investors



11/22

ISTP 5


Development of AMS/3 (Cont.) Testing was done at three level

o Com ponent testing

o Partial integration testing between component s

o In teg ra tion tes tin g w hich tes ted end-t o-process

Overall testing was 40% of the project


Three layer implementation

o Preparation: applications were moved to production environment

o 1st l a y e r : infrastructure was implemented

o 2 n d l a y e r : access portions were launched; terminals, workstations, etc.

o 3 rd l a y e r : new trading functions were introduced

Development of AMS/3 (Cont.)



12/22

ISTP 5


AMS/3: Outcome Investors can query or order from mobile phones or Internet;o their brokers should have registered with AMS3

Brokers can enter orders like earlier and through open

gateway;

o Data can flow between AMS/3 and brokers back office systems

Customized services for individual investors

More transparent;

o Timely information to members & investors

The largest trading system with 500 exchange participants

Now foundation of industry ecosystem







13/22

ISTP 5


Internet-Based Systems Internet users are sophisticated; Internet based systems;o are to be scalable, reliable

o Needed t o be inter connected in tern ally an d externally w ith cus tom ers

and partners

Programming language differences have to be dealt with

Three aspects of Internet based systemso F r a m e w o r k : application servers

o La n g u a g e : Java

o En v ir o n m en t: Web Services


Application Servers A middleware to link a Web server to application on

other company systems

Client

Web serverApplication

server

DBMS



14/22

ISTP 5


Java Component-based tools with open systems for rapidInternet based systems development

Become an standard platform for developing server-

side applications

o Ja va 2 En terp rise Ed ition (J2EE)

o En terpr ise Java Beans (EJB)


Web Services Self-contained, self-describing business and consumer

modular applications, delivered over the Internet, thatusers can select and combine through almost any device(from personal computers to mobile phones)

Two methods available1. Ex p os in g: existing codes wrapped in XML) and give an Internet address

2. Using an e x pose d code



15/22

ISTP 5


Using a Web Service


Service from Registry

1. Publish theservice available

2. Searchto find a service

3. Service found

4. Call the Service provider

5. Response

Web Service

Consumer

Web Service

Provider

Building a Web ServiceCase Example



16/22

ISTP 5


S t e p 0 1: Expose the code

o Currency conversion code of a credit card processor is encapsulated in an XML

wrapper

Building a Web Service



Building a Web Service (cont)


17/22


18/22

ISTP 5


S t e p 0 3 : Publish the service; service description let for

others to find

o Done by registering it in a UDDI (Universal Discovery, Description, and

Integration) registry; a Web Services yellow pages






19/22

ISTP 5


S t ep 0 4 : Find a currency conversion

Web service

o Other services can find this service. E.g., a Pricing

Web Service

o The Pricing w eb sends a request

o Asks for a list ing of cur ren cy conversion Web

Services

o The reply is sent back



Building a Web Service (cont) S t e p 0 5 : Invoke a Web service

o The Pricing Web Service can now invoke the selected currency conversion WebService

E.g., Convert $1000 into SLR



20/22

ISTP 5







21/22

ISTP 5


Sample Web Service







22/22

ISTP 5


Documents

ISTP Presentation - Final