ToC: Pros & Cons

Helps to explain both how and why change takes place
Can be relatively straightforward or more complex
Does not follow a rigid ‘one size fits all’ format
Encourages NGOs and others to really think about what their project is trying to do and what assumptions they are making
It can help you adjust your project in ways that increase its prospects of success
It can help you identify intermediate outcomes
It enables organisations to think about their work and their organisation more deeply

Advantages

It can end up being over-simplified, over-complicated or simply wrong with arrows connecting boxes in ways that could never be possible
Its value is not always recognised by funders
It can throw up challenging findings (were your assumptions completely wrong, where you were barking up the wrong tree)

For key differences between the Theory of Change and logframe, click here.