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; This file is part of "NOVA":  NOVA = search + COCOMO tools
; Copyright, 2008, Tim Menzies tim@menzies.us
;
; NOVA is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; NOVA is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; You should have received a copy of the GNU General Public License
; a long with NOVA.  If not, see <http://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(in-package :xomo.model)

(defun months (&optional (pm (effort)))
  "Returns elapsed development time in months."
  (macrolet ((f (x) `(em2effort ',x))
	     (s (x) `(sf2effort ',x)))
    (let* ((c             (! 'c))
	   (d             (! 'd))
	   (sced          (em-range (! 'sced)))
	   (sced-percents '((1 . 75) (2 . 85) (3 . 100) (4 . 130) (5 . 160)))
	   (sced-percent  (geta (round sced) sced-percents));like STAR
;;           (sced-percent (interpolates sced (list (assoc (floor sced) sced-percents)
;;                                                  (assoc (ceiling sced) sced-percents))))
	   (pm-no-sced    (/ pm (f sced)))
           (e-less-b      (* 0.01
			     (+ (s prec) (s flex)
				(s resl) (s team)
				(s pmat))))
	   (f             (+ d (* 0.2 e-less-b))))
      (* c (expt pm-no-sced f) (/ sced-percent 100)))))

(register-scoring-method-by-parameters 'months "Months" #'months #'<)