1

KenjutsuKenjutsu on legacy systems on legacy systemsHow to swing the sword How to swing the sword

and separate valuable from and separate valuable from outdated partsoutdated parts

2

Efficiency

Time to market Cost of change

Changeability

InvestmentCompetitiveness

Agility

3

Start from scratch

Invasive Engineering

Regular change

Ways to change a system …

4

5

GSM Router

Custom Interface Board

Single Board Computer

6

7

8

Ticket Vending Machine

Planning / Procurement / Construction

Case / Mechanics

Coin Tower

Payment

COTS Processing Unit (Desktop Computer Board)

CommPrinters

I/O

Business Logic

Ticketing HMI Maintenance HMI

…Tariff

Printing

Operating System (Linux)

…

EP2I/O Extender

Caroussels

9

Retrospective

Saved investments

Systems became changeable

65 Passenger Information Displays 700 Ticket Vending Machines

Invasive engineering works!

10

Source and frequency of change

RuleProcess

DesignFashion

Technology

Physics

Stable

Dynamic

11

Our kids will have to deal with our legacy

give them a chance!

Align boundaries to frequency of change

Supercomputing Systems AG Phone +41 43 456 16 00Technopark 1 Fax +41 43 456 16 108005 Zürich www.scs.ch

Vision meets reality.

Supercomputing Systems AGChristian Bühlmannchristian.buehlmann@scs.ch +41 43 456 16 00