BI THIT K TH NGHIM CM QUAN BI 2: SO SNH PHP TH GING KHC V PHP TH TAM GIC Phn cng cng vic Phm Th Ngc Trm: Trn Ngc Trai: V Nguyn Thy Trang: Nguyn Minh Trung: Nguyn Th nh Tuyt: II. Gii thiu 1. Php th Ging Khc (So snh cp i sai bit) 1.1 Mc ch: Php th Ging - Khc cho php xc nh liu hai sn phm c khc nhau hay khng nhng khng ch r khc nhau c tnh no. p dng cho sn phm c hu v ko di hoc ch c chun b trong thi gian ngn. Php th ny thch hp trong tnh hung bn mun kim tra xem sn phm lm ra c ging vi mt sn phm hin c ca Cng ty hay khng. a ra quyt nh cho cng ty c nn sn xut theo phng n mi hay khng. 1.2 Tnh hung thc t cn s dng php th Mt cng ty sn xut snack ang nghin cu thay i cng thc gia v (gim bt gia v) nhng khng mun ngi tiu dng nhn ra. Cho nn b phn cm quan tin hnh mt bui cm quan gia hai dng sn phm, ngi th l ngi tiu dng, khng cn qua hun luyn. I.

1.3 Nguyn liu Bnh snack 1.4 Ngi th Ngi bnh thng, khng cn qua hun luyn. 1.5 Phng php 24 ngi th (chia 2 t, ty theo iu kin phng th nghim). 1.5.1Chun b mu v dng c khc a) Kch thc v hnh thc trnh by -1 da s cha 2 ming snack - 24 ngi=96 ming snack -1 gi snack ?g ?g ming -Nhit th: nhit thng b) Dng c - 24 ci a - 12 ly nc thanh v - 24 khn giy - 48 giy stick - 4 khn trng tri bn - 1 da ng mu tha, - 1 ti rc - 12 bt bi. -S phiu hng dn:12 -S phiu tr li:24 1.5.2iu kin phng th nghim (trong iu kin thc t) 1.5.3M ha mu trt t trnh by mu

(S c 2 ln thc hin vi trt t trnh by mu nh nhau)

M s ngi Trt t trnh th by mu 01 B-A 02 A-B 03 A-A 04 A-A 05. A-B 06 B-B 07 B-A 08 B-A 09 B-B 010 B-B 011 A-A 012 A-B 1.5.4Phiu hng dn

M ha mu 142-974 423-721 587-501 530-190 285-826 318-427 158-590 351-783 694-976 450-371 546-568 478-318

PHIU HNG DN Xin vui lng thanh v bng nc lc trc khi th mu. Mt b mu gm 2 da ng bnh snack s c gii thiu vi Anh/Ch. Anh/Ch hy nm th mu theo th t t tri sang phi v cho bit 2 mu l ging hay khc nhau. Anh/Ch hy tr li bng cch KHOANH TRN vo t tng ng trong phiu tr li. Hy a ra cu tr li cho mi trng hp, ngay c khi bn khng chc chn. Xin cm n!

1.5.5 Phiu tr li PHIU TR LI M s ngi th: ........................... Hai mu: ............... & .................... GING KHC Ngy: .....................

1.5.6 Cch tin hnh th nghim: - Chun b y dng c, mu,dn phiu hng dn trn v tr th mu. - Mi ngi th vo phng th. - Ngi hng dn s hng dn ngi th cch thc tin hnh cm quan. - Phc v mu v pht phiu tr li. - Sau tin hnh thu mu v phiu tr li ( cn kim tra k phiu tr li trc khi thu ). - Dn dp sch s khu vc th mu. 1.6 Kt qu: Tng s cu tr li: S cu tr li ng: S cu tr li sai: 1.7 X l s liu: Kt lun:

2. Php th Tam gic 2.1Mc ch: Php th Tam gic cho php xc nh liu hai sn phm c khc nhau hay khng nhng khng ch r khc nhau c tnh no. Php th ny thch hp trong tnh hung Cng ty mun a mt sn phm mi ra th trng v mun kim tra xem sn phm c ging vi mt sn phm hin c ca Cng ty ang c tiu th rng ri trn th trng hay khng. V a ra quyt nh cho cng ty c nn sn xut theo phng n mi hay khng. 2.2 Tnh hung thc t cn s dng php th Mt cng ty sn xut snack ang nghin cu thay i mt loi nguyn liu khc (gim bt gi thnh) nhng khng mun ngi tiu dng nhn ra. Cho nn b phn cm quan tin hnh mt bui cm quan gia hai dng sn phm, ngi th l ngi tiu dng, khng cn qua hun luyn. 2.3 Nguyn liu Bnh snack 2.4 Ngi th Ngi bnh thng, khng cn qua hun luyn. 2.5 Phng php 24 ngi th (chia 2 t, ty theo iu kin phng th nghim).

2.5.1Chun b mu v dng c khc c) Kch thc v hnh thc trnh by -1 da s cha 2 ming snack - 24 ngi=144 ming snack -1 gi snack ?g ?g ming -Nhit th: nhit thng d) Dng c - 36 ci a - 12 ly nc thanh v - 24 khn giy - 72 giy stick - 4 khn trng tri bn - 1 da ng mu tha, - 1 ti rc - 12 bt bi. -S phiu hng dn:12 -S phiu tr li:24 2.5.2iu kin phng th nghim (trong iu kin thc t) 2.5.3M ha mu trt t trnh by mu (S c 2 ln thc hin vi trt t trnh by mu nh nhau)

M s ngi Trt t trnh th by mu 01 B-B-A 02 B-A-B 03 A-B-B 04 A-A-B 05 A-B-A 06 B-A-A 07 B-A-A 08 A-B-B 09 A-B-A 010 B-B-A 011 A-A-B 012 B-A-B 2.5.4Phiu hng dn

M ha mu 205-935-129 582-215-391 870-728-869 632-803-470 375-839-930 320-983-471 957-178-762 614-241-286 692-183-271 182-324-129 408-693-341 935-426-739

PHIU HNG DN Xin vui lng thanh v bng nc lc trc khi th mu. Mt b mu gm 3 da ng bnh snack s c gii thiu vi Anh/Ch. Anh/Ch hy nm th mu theo th t t tri sang phi v cho bit mu khc hai mu cn li. Anh/Ch hy tr li bng cch GHI vo ch trng tng ng trong phiu tr li. Hy a ra cu tr li cho mi trng hp, ngay c khi bn khng chc chn. Ch : Khng th li mu trc nu th n mu th hai. Gi cc ln nm mu khng s dng nc thanh v. Xin cm n!

2.5.5 Phiu tr li PHIU TR LI M s ngi th: ........................... Ngy: .....................

Mu khc hai mu cn li l: .....................................

1.5.6 Cch tin hnh th nghim: - Chun b y dng c, mu,dn phiu hng dn trn v tr th mu. - Mi ngi th vo phng th. - Ngi hng dn s hng dn ngi th cch thc tin hnh cm quan. - Phc v mu v pht phiu tr li. - Sau tin hnh thu mu v phiu tr li ( cn kim tra k phiu tr li trc khi thu ). - Dn dp sch s khu vc th mu. 1.6 Kt qu: Tng s cu tr li: S cu tr li ng: S cu tr li sai: 1.7 X l s liu: Kt lun: