The appmarq report, from software quality benchmarking firm Cast, carried out analysis of 288 applications at 75 organisations across the UK.
The research looked at organisations in the following sectors: energy and utility, financial services, insurance, IT consulting, technology, telecom, manufacturing and public sector.
The report found public sector applications to be the most difficult and expensive to change
From the sample Cast found that the median public sector application changeability score is 25% lower than the highest changeability score, which is the IT consulting sector.
Additionally public sector application changeability is 11% lower than the second lowest changeability median score, which is the Insurance sector. Cast said the findings are only a guide and it cannot yet generalise this result to the entire portfolio of public sector applications.
The findings put into perspective the challenge facing the government's cost cutting plans. New suppliers will need to change systems to support cost cutting.
The government outsources 75% of applicants compared to 50% in the private sector, says the report.