Re: [O] Estimate ranges in column view

[Sebastien Vauban]

Hello,

"Sebastien Vauban" wrote:
> Carsten Dominik wrote:
>> On Jun 22, 2010, at 4:36 AM, Michael Gauland wrote:
>>> Here is a patch for a new 'est+' summary type, including corresponding
>>> changes for xemacs and the manual. I've done basic testing on the GNU emacs
>>> version, but not the xemacs code.
>>>
>>> [...]
>>>
>>> +                @address@hidden    @r{Add low-high estimates.}
>>>
>>> [...]
>>>
>>> +For example, suppose you had ten tasks, each of which was estimated at 0.5
>>> +to 2 days of work. Straight addition produces an estimate of 5 to 20 days,
>>> +representing what to expect if everything goes either extremely well or
>>> +extremely poorly. In contrast, 'est+' estimates the full job more
>>> +realistically, at 10-15 days.
>
> Though, if we take 2 tasks, with an estimation of:
>
> - exactly 1 day for task 1, and
> - between 0.5 day (min) and 0.75 day (max) for task 2,
>
> we get an estimation of 2 days for both together...
>
> #+BEGIN: columnview :hlines 1 :maxlevel 2
> | Task          |   Estim. |
> |---------------+----------|
> | * Development |      2-2 |
> | ** Task 1     |        1 |
> | ** Task 2     | 0.5-0.75 |
> #+END:
>
>>> +(defun org-estimate-print (e &optional fmt)
>>> +  "Prepare a string representation of an estimate, as two numbers with a
>>> -' in between them."
>>> +  (if (null fmt) (set 'fmt "%.0f"))
>>> +  (format "%s" (mapconcat (lambda (n) (format fmt n))  e "-")))
>
> That's because of the rounding to the closest integer, done in the above
> function.
>
> Shouldn't we allow for 1 or 2 decimals?
>
> Or is there a possible way to guess what the best rounding could be?

Another note: wouldn't it better to just write "2" when both bounds (min and
max) are equal, that is *not* displaying an estimate of "2-2"?

Best regards,
  Seb

-- 
Sebastien Vauban