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larming news about major mainframe leg-

acy IT migration failures has featured regu-

larly in the world’smedia recently.Migrating

mission critical applications frommainframe legacy

IT infrastructures is a complex and often risky pro-

cess – in fact it’s often compared to performing a

heart transplant on a runner during a marathon.

The systemmust be functional at all times, while the

level of functionality and service quality after the

migration must be equal to, or better than before.

Enterprises make several common critical mis-

takes when attempting a mainframe migration.

Often, companies simply decide to completely

replace their current system because it does not

meet critical business requirements. However, in-

cremental modernisation is always less risky than a

complete replacement, which will lead to changes in

technology, operations, functionality and user expe-

rience. Plus, there’s no such thing as a project that is

too big to fail. In addition, companies tend to have

unrealistic expectations about migration solutions.

Any solution that changes the basic functionalities

of an IT infrastructure, or requires an enterprise to

change its business processes – such as a complete

system rewrite – will take several years to complete.

Some senior executives fail to evaluate whether they

can afford to wait that long, or guarantee that their

organisation can remain stable during that period.

There are several easy ways, however, to prevent

a mainframe migration nightmare.


uating their existing legacy systemto develop a com-

prehensive business case for migration. They must

also carefully weigh up the benefits and drawbacks

of the available options. These may include migrat-

ing, rewriting or transforming code, rehosting the IT

infrastructure, or deploying a commercial-off-the-

shelf or enterprise resource planning solution. To

ensure they select the most appropriate option, en-

terprises should analyse the costs of each approach

and how it will drive revenue and reduce risk.

Once an enterprise has selected a migration

solution, it should ensure that a comprehensive

plan has been agreed by everyone involved. Strong

organisational commitment is a key factor in com-

pleting a mainframe migration successfully.

Asysco offers turnkey solutions and expertise

for delivering successful, high-quality mainframe

transformation and modernisation projects.

Transformation enables organisations to reduce

costs, increase flexibility, and facilitate streamlined

business process integration.

Since its foundation in 1979, Asysco has per-

formed more than 60 migration projects with a

100% success rate. Our motto – Unlocking Your

Legacy Value – expresses our confidence that leg-

acy transformation projects make sense, that the

risks can be well managed, and that the resulting

business value is outstanding.

Herman Eggink is chief commercial officer at Asysco

Preventing migration

mainframe nightmares

Critical mainframe migrations can be risky, but companies can take

several easy steps to guarantee project success




“Strong organisational commitment

is a key factor in completing a

mainframe migration successfully”