▁evalu ations ▁that ▁are ▁method olog ically ▁rig orous ( B am berger , ▁R ugh , ▁Church ▁& ▁Fort , ▁ 2 0 0 4 ). ▁This ▁approach ▁has ▁respond ed ▁to ▁the ▁continued ▁greater ▁need ▁for ▁evaluation ▁processes ▁that ▁are ▁more ▁rapid ▁and ▁econom ical ▁under ▁difficult ▁circumstances ▁of ▁budget , ▁time ▁constraints ▁and ▁limited ▁avail ability ▁of ▁data . ▁ ▁However , ▁it ▁is ▁not ▁always ▁possible ▁to ▁design ▁an ▁evaluation ▁to ▁achieve ▁the ▁highest ▁standards ▁available . ▁Many ▁programs ▁do ▁not ▁build ▁an ▁evaluation ▁procedure ▁into ▁their ▁design ▁or ▁budget . ▁Hence , ▁many ▁evaluation ▁processes ▁do ▁not ▁begin ▁until ▁the ▁program ▁is ▁already ▁under way , ▁which ▁can ▁result ▁in ▁time , ▁budget ▁or ▁data ▁constraints ▁for ▁the ▁evalu ators , ▁which ▁in ▁turn ▁can ▁affect ▁the ▁reli ability , ▁valid ity ▁or ▁sens itivity ▁of ▁the ▁evaluation . ▁> ▁The ▁sho est ring ▁approach ▁helps ▁to ▁ensure ▁that ▁the ▁maximum ▁possible ▁method ological ▁rig or ▁is ▁achieved ▁under ▁these ▁constraints . ▁ ▁Bud get ▁constraints ▁Fre qu ently , ▁programs ▁are ▁faced ▁with ▁budget ▁constraints ▁because ▁most ▁original ▁projects ▁do ▁not ▁include ▁a ▁budget ▁to ▁conduct ▁an ▁evaluation ▁( B am berger ▁et ▁al ., ▁ 2 0 0 4 ). ▁Therefore , ▁this ▁automatically ▁results ▁in ▁evalu ations ▁being ▁allocated ▁smaller ▁bud gets ▁that ▁are ▁in ade qu ate ▁for ▁a ▁rig orous ▁evaluation . ▁Due ▁to ▁the ▁budget ▁constraints ▁it ▁might ▁be ▁difficult ▁to ▁effectively ▁apply ▁the ▁most ▁appropriate ▁▁ ▁method ological ▁instruments . ▁These