The report from the Children's Safety Board, which represents the agencies involved, is to be published this week.
It identifies multiple failings by nine different agencies and says 31 chances to intervene were missed over 14 years.
Two brothers aged 10 and 11 at the time have admitted carrying out the brutal attack and will be sentenced this week.
The report, which was ordered after the attack on an 11-year-old and nine-year-old boy, is the latest serious case review centred around Doncaster, where seven children have died since 2004, despite being on the at risk register.
It identifies multiple failings by nine different agencies and says 31 chances to intervene were missed over 14 years.
Two brothers aged 10 and 11 at the time have admitted carrying out the brutal attack and will be sentenced this week.
The report, which was ordered after the attack on an 11-year-old and nine-year-old boy, is the latest serious case review centred around Doncaster, where seven children have died since 2004, despite being on the at risk register.
