Sprint ETA

app/models/sprint.rb

@@ -47,6 +47,16 @@ class Sprint < Version
         return (self.sprint_start_date .. cutoff).select {|d| (d.wday > 0 and d.wday < 6) }
     end
 
+    def eta
+        return nil if ! self.start_date
+
+        v = self.project.velocity
+        return nil if ! v or ! v[:days_per_point]
+
+        # assume 5 out of 7 are working days
+        return self.start_date + Integer(self.points * v[:days_per_point] * 7.0/5)
+    end
+
     def has_burndown
         return !!(self.effective_date and self.sprint_start_date)
     end

lib/issue_patch.rb

@@ -77,9 +77,9 @@ module IssuePatch
             return nil if !self.is_story? || ! self.story_points || self.story_points <= 0
 
             v = self.project.velocity
-            return nil if ! v or ! v[:velocity] or v[:velocity] <= 0
+            return nil if ! v or ! v[:days_per_point]
 
-            return self.story_points * (v[:days] / v[:velocity])
+            return Integer(self.story_points * v[:days_per_point])
         end
 
         def update_parent_attributes_with_remaining_hours

lib/project_patch.rb

@@ -26,7 +26,14 @@ module ProjectPatch
                 days += sprint.days.length
                 accepted += (sprint.stories.select{|s| s.status.is_closed && s.story_points}.inject(0){|sum, s| sum + s.story_points}) || 0
             }
-            return {:date => most_recent, :sprints => sprints.length, :days => days / sprints.length, :velocity => accepted / sprints.length }
+            velo = {:date => most_recent,
+                    :sprints => sprints.length,
+                    :days => days / sprints.length,
+                    :velocity => accepted / sprints.length}
+            if velo[:velocity] and velo[:velocity] >= 0
+                velo[:days_per_point] = (velo[:days] * 1.0) / velo[:velocity]
+            end
+            return velo
         end
 
     end