OED does list 'able' first. This is essentially a sub's thing (ie,
collectible is usually preferred by subs) - collectible has historically
been preferred, although 'able' has been increasingly common in the past 10
years.

Both are acceptable. There are no usages of either on GOV.UK - I'm happy
for it it stay as 'collectable'.


On 17 September 2013 13:11, James Abley <notifications@github.com> wrote:

> In service-manual/measurement/other-kpis.md:
>
> > @@ -52,7 +52,7 @@ An approach that worked well for GOV.UK was to run a brainstorming session to ge
> >
> >  ##Decide what to measure
> >
> > -Develop simple, actionable and collectable metrics based on your understanding of user and stakeholder needs. Identify where that information will come from and how frequently it will be needed. Think especially about the functions your service is relying on and try to identify some KPIs to ensure you are constantly monitoring and improving these functions.
> > +Develop simple, actionable and collectible metrics based on your understanding of user and stakeholder needs. Identify where that information will come from and how frequently it will be needed. Think especially about the functions your service is relying on and try to identify some KPIs to ensure you are constantly monitoring and improving these functions.
>
> OED? I thought the former was fine, but haven't looked it up.
>
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>