This can be divided into 2 main areas.
Business consultancy
Consultancy looking at the business objectives and then doing a full system analysis of the current flow of information from sales to order / despatch and invoicing to final payment.
Would simple changes to the manual system make the system more efficient?  Design a combination of manual and computer improvement to resolve problems and improve efficiency.
Infasture consultancy
Looking into the current computer and telecommunications facilities.

1.  Hardware System Reviews

1. Are all the machines upto specification
2. Hardware test

Service pack tests

2. Wiring and Information
1. Is the power supply stable
2. Is the compute environment stable
3. When servers are involved is there adequate cooling.
4. Are LANS and WANS up to current specification.
3. System Security
1. Backups - frequency location
2. Disaster recovery
3. Standby systems
4. Passwords etc.
4. Hardware System Reviews
1. Are all the machines upto specification
2. Hardware test
3. Service pack tests