Manchester City Council

The Council & democracy Manchester statistics in the Intelligence hub

Evaluation advice


Cost benefit analysis guidance for local partnerships - developed by New Economy and has become part of the Treasury’s Green Book.


What does 'evidence base' mean?

Highly evidence-based ratings interventions have been subject to randomised control trials (RCTs), which means one group of people has the intervention and a 'control' group does not, and data is compared.  Some of the highest evidence-based interventions are when RCTs on the same intervention have been compared.

An emerging field of evidence-base proof is cost benefit analysis (CBA) which means that research has been undertaken into the upfront unit cost of an intervention, what we are spending on families/households/individuals, and then we can see how much money we have saved at the end of the intervention and understand which budgets those savings can be made from.

In the field of medicine, they more commonly use ratings to describe levels of evidence:

1 rating



1a        -           Systematic review of a number of Randomised Control Trials
1b        -           Randomised Control Trial 



2 rating
2a        -           Systematic review of cohort studies
2b        -           Individual cohort study
2c        -           Outcome research

3 rating
3a        -           Systematic review of case control studies
3b        -           Individual case control study

4 rating
Case series (poor quality cohort case control)

5 rating
Expert opinion

What evaluation tells us 

Evaluating what we do and what we commission matters.  We need to know that what we spend public money on works to support families and households to become more self-reliant at the earliest opportunity.

It is important that when evidence-based interventions are selected, they are delivered to treatment or model fidelity, otherwise we are just doing 'activity', and not delivering the treatment programme.  If we do not deliver interventions 'as they say on the tin', they simply will not work.

It is better to understand the system in which interventions operate and the connectivity of case management systems and assessment processes, so it is vital that systems are also evaluated, not just interventions.  If we can understand the flow in the system better, we have a great chance of simplifying processes.


A list of standardised measurement tools

Information about Beck Depression Inventory

Information about Adult Adolescent Parenting Inventory (AAPI -2) (external site)

Information about Strengths and Difficulties Questionnaire (external site)

Information about Common Assessment Framework (CAF) (external site)

Information on parenting (external site)

Information on Warwick-Edinburgh Mental Well-being Scale (WEMWBS) (external site)

Information on Eyberg Child Behaviour Inventory (external site)

Back to the Intelligence Hub

Was this page helpful?

Was this page helpful?