MORE than 50 projects have suffered delays or cost blow-outs an analysis of the State Budget has revealed.

The value of projects that have blown out in cost or suffered delays is more than five times the amount revealed in this month's State Budget.

Treasurer Jack Snelling unveiled spending delays to six projects totalling $721 million - but analysis by The Advertiser shows 55 projects totalling $3.8 billion have suffered delays or increases in their total cost.

The comparison of the Government's Capital Investment Statements from 2010-11 and 2011-12 reveals the Government's massive infrastructure program and Budget position is coming under greater pressure than is being publicly admitted.

Projects suffering delays and overruns include:

ELECTRIFICATION of the Gawler railway line, which has jumped by $58 million to $460.3 million.

RELOCATION of the SA Police headquarters, up $7.1 million to $40.8 million.

BOTANIC Gardens wetlands project, up $2.5 million to $8.5 million and its completion delayed a year.

A CLIENT management system to properly manage cases within the Department of Families and Communities has been delayed two years because of an internal departmental restructure.

A POLICE system aimed at speeding up the processing of intervention orders for domestic violence victims has been delayed 18 months.

THE Fort Largs Police Academy project expects a $5.6 million saving on the back of "favourable tender outcomes".

THE Government's $17 million Land Services Business Reform, billed as "the most significant period of business reform since the land register was made electronic", will take another two years.

A spokesman for Transport Minister Patrick Conlon said the $58 million hit to the Gawler electrification reflected additional projects that had been rolled into the project but the department was also expecting higher labour and safety costs.

"We have asked for more money than we first estimated and we know we are going to spend more money but we won't know how much until we get the final contract prices," he said.

"We have gone to Treasury with the higher price now rather than asking later - it is probably more forward-looking than we previously have been, but we won't know how much of that we will use until we finalise the contracts."

Not all project slippages are large.

A $1 million computer system aimed at speeding up intervention orders for victims of domestic violence has been delayed for 18 months as the Government faces problems implementing the necessary legislative changes.

Former Attorney-General Michael Atkinson introduced the legislation into Parliament in September 2009, saying the Government was "concerned about the prevalence of domestic violence and its potentially lethal consequences".

A spokesman for Attorney-General John Rau said the project was more complex than originally thought but the Government wanted to make sure "all agencies are well prepared and co-ordinated so that the program delivers on its promise."

Victims Rights Commissioner Michael O'Connell said he was concerned that if the shortcomings in the current system were not addressed, the safety of victims could be compromised.

"Victim safety is paramount," he said."

"The Government promised to better protect domestic violence victims - it is on notice to show that promise was not empty."

Software problems have delayed four projects - including the Government's new Shared Services eProcurement system and SA Lotteries' new online system - for a total of four years.

A $15.5 million project to expand government employee housing at Roxby Downs has been extended by another year, to June 2012, waiting for approval of BHP Billiton's environmental impact statement for its Olympic Dam expansion.

The public face of the state's growing defence industry, Defence SA, has been hit hard by a slowing property market as it attempts to expand its Techport footprint. Completion of the Osborne North Industrial Precinct has been set back 30 months because of a "revision in expected demand for industrial allotments" while its Northern Lefevre Peninsula Masterplan, the Common User Facility and the Secure Electronic Common User Facility at Mawson Lakes have been set back 12 months each because expected demand has slumped.

Defence Teaming Centre chief executive Chris Burns said the delay at the precinct would not affect the industry's demand for land in the area. He said when the Air Warfare Destroyer project ramped up, industry would move in.

"The industry will only move there and have demand when there is a project there to have cash flow from," Mr Burns said.

"It is a long-term strategic investment, and it will take time."

Treasurer Jack Snelling said the delays and changes represented only a small proportion of the Government's entire infrastructure program, which showed that the Government was focused on moving the state forward.

"With a $9.1 billion infrastructure build over the next four years, it is inevitable that timing or details of some of these projects may change or may need to be altered over time," he said.

"These changes can occur for a variety of reasons, many of which can be outside direct government control, but we remain committed to continuing to roll out the biggest infrastructure investment in the state's history."