This was the advice to tif members from Jane Kimberlin, IS director of Powergen, who has completed a successful re-insourcing programme extricating the company from a long-term, 12-year outsourcing contract with Perot Systems.
Kimberlin also urged tif members to outsource only when they had achieved the lowest possible internal costs.
"They should be short term, from three to five years, and involve selected tasks, not everything.
Contract details are vital: "You have to think change," she stressed.
Tif - sharing knowledge to save costs
The Infrastructure Forum is an active cross-industry group of senior IT infrastructure directors and managers from more than 80 major UK companies set up five years ago to share their knowledge and experience to resolve business and technical infrastructure issues.
The focus is on medium to very large organisations, which it welcomes as members. Tif is driven by the needs of its members, such as Glaxo, Shell and BAA, to deliver high-performance IT at lower cost. Members have a combined annual IT spending power of about £16bn.
Tif chairman Tim Gregory, IT director at BACS, announced that the organisation is in expansion mode and aims to nearly double its membership to 150 members.
"We've streamlined our administration, have a proactive communications programme, can offer a wider range of services and have revised our management structure," he told members at the conference.