Reg Dickason, a security expert hired by Cricket Australia (CA), completed his assessment of southern port city Karachi following the strong reaction of Australian players about competing in Pakistan.
"It's a reasonable start," Dickason said of his inquiry." Some fine tuning needs to be done and everyone acknowledges that. In time, the security situation will be enhanced."
Pakistan hosts the elite eight-nation event from September 11-28. Sri Lanka is the alternate if the International Cricket Council (ICC) deems Pakistan unsuitable to host the event.
With Sri Lanka in the midst of heavy fighting between government forces and rebels, South Africa was also selected as possible hosts, an ICC source told AFP on Friday.
The ICC will discuss an independent security assessment -- done last month -- during its meetings in Dubai starting Sunday, before making a final decision.
It was on Dickason's advice that Cricket Australia (CA) called off their national team's tour to Pakistan for one-dayers and Tests in March and April following a series of bomb blasts earlier this year.
CA agreed to reschedule the tour split into two visits -- one-dayers in 2009 and Tests in 2010 -- after improvement in security in Pakistan following February's general elections.
But renewed fears have put the Champions Trophy in doubt despite ICC giving an all-clear to Pakistan during last week's Trophy launch.
"You don't have to be Einstein to figure there will be some concern among our team," Australian skipper Ricky Ponting was quoted as saying in the Australian media. "We'll know a lot more about it after a security assessment."
Players from New Zealand and England have also said they were worried about safety in Pakistan, where government forces on Saturday launched an offensive against militants in the northwest and the country's top Taliban chief halted talks with the government.
Dickason, who said he met the Pakistan Cricket Board and some independent security consultants, said the board and others were working to improve security.
"I think everybody would like to play here and it is why Pakistan Cricket Board and others have put in so much work here.
"The Trophy is still two-three months away. There is still work in progress," he added.