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МЕТОДИ ЗА ОЦЕНКА НА
БАЗОВАТА ЛИНИЯ НА ПРОДАЖБИТЕ
Гл.ас.д-р Атанас Луизов
Бургаски свободен университет
Основни понятия (1)
1

Базови продажби

… оценка на продажбите при липса на специфична промоционална
активност за дадена марка за определен период.

Допълнителни продажби
… тези продажби, които са директно повлияни от промоцията по време
на периода на провеждането й.
Основни понятия (2)
2

Incremental sales
Baseline sales

Post-promotion dip

Total sales = Baseline sales + Immediate incremental sales

Incremental sales = f (temporary price reduction, displays, features, …)
Baseline sales = f (regular shelf price, advertising stock, distribution,
competitive activity, seasonality, …)
Методи за оценка на базовата линия на продажбите
3

В практиката най-общо се използват четири подхода:
изглаждане на реда;
използване на дъми променливи;
прилагане на Фурие анализ;
комбинация между горните.
Метод Forward-backward (A.C.Nielsen)
4

BLQFt  Q t 1  (1   )BLQFt 1
BLQR t  Q t 1  (1   )BLQR t 1
BLQFt  BLQR t
BLQt 
2
Метод Forward-backward с коригиране (A.C.Nielsen)
5

BLQFt  Q t 1  (1   )BLQFt 1
BLQR t  Q t 1  (1   )BLQR t 1
BLQFt  BLQR t
PBLQt 
2
S

ADJ t 

Q

it

i 1

S

 PBLQ

it

i 1

BLQ t  ADJ t * PBLQt
Метод Forward only с корекция (Nielsen Solution System)
6
BLQFt  Q t 1  (1   )BLQFt 1
BLQR t  Q t 1  (1   )BLQR t 1
PBLQt 

BLQFt  BLQR t
2
N

ADJ t 

Q

it

i 1

N

 PBLQ

it

i 1

S

COR t 

Q

it

i 1

S

 PBLQ

it

i 1

BLQ t  G t * PBLQt
ADJ t

Gt  
 N * ADJ t  (20  N) * COR t

ако

N  20
ако
N  20
Метод Forward only със сезонна корекция
(IRI Promotionscan)
7

DLQFt  

Qt
 (1   )DBLQFt 1
It

PBLQt  I t * DBLQFt 1
N

ADJ t 

Q

it

i 1

N

 PBLQ

it

i 1

BLQ t  ADJ t * BLQPt
Емпирично приложение на метода Forward-Backward
.

8

Брой наблюдения: 105 седмици
Тип на промоцията: ценова
Метод за оценка: Forward-Backward
Варианти:
-Различен брой периоди преди и след промоцията
-Отчитане на пред- и след-промоционални седмици
Таблица 1
Базова линия на продажбите на марка А
.

9
Модел
4

4а

8

8а

12

12а

α

MSЕ

MPE

0,0
0,0

213,19
717,0

-3,33
-8,51

0,0
0,0

187,69
486,0

-3,03
-12,85

0,0
1,0

416,38
761,13

-3,09
0,41

BLFQt
BLRQt
Базова линия на
продажбите

87,75
71,00

BLFQt
BLRQt
Базова линия на
продажбите

79,25
60,00

BLFQt
BLRQt
Базова линия на
продажбите

84,75
59,88

BLFQt
BLRQt
Базова линия на
продажбите

81,25
53,63

0,0
0,0

173,19
301,989

-2,60
-8,19

67
76,5
57,08

0,5
1,0

292,75
241,71

-0,47
5,35

67
74,33
55,00

0,0
0,0

244,72
215,83

-4,64
-1,92

BLFQt
BLRQt
Базова линия на
продажбите
BLFQt
BLRQt
Базова линия на
продажбите

79

70

72

65
Таблица 2
Промоционален ефект (в стокови единици)
.

10

Модел

Базова линия на
продажбите
4
4а
8
8а
12
12а

79
70
72
67
67
65

Промоционален
ефект
66
75
73
78
78
80
Изводи
.

11

1. Оценката на базовата линия на продажбите зависи от дължината
на периодите.
2. Наличието на екстремуми може чувствително да промени
оценката на базовата линия.
3. Отчитането на периоди след промоцията може да резултира в пониска базова линия.
Благодаря за вниманието!

Атанас Луизов
louizov@abv.bg

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Methods for baseline estimation

  • 1. МЕТОДИ ЗА ОЦЕНКА НА БАЗОВАТА ЛИНИЯ НА ПРОДАЖБИТЕ Гл.ас.д-р Атанас Луизов Бургаски свободен университет
  • 2. Основни понятия (1) 1 Базови продажби … оценка на продажбите при липса на специфична промоционална активност за дадена марка за определен период. Допълнителни продажби … тези продажби, които са директно повлияни от промоцията по време на периода на провеждането й.
  • 3. Основни понятия (2) 2 Incremental sales Baseline sales Post-promotion dip Total sales = Baseline sales + Immediate incremental sales Incremental sales = f (temporary price reduction, displays, features, …) Baseline sales = f (regular shelf price, advertising stock, distribution, competitive activity, seasonality, …)
  • 4. Методи за оценка на базовата линия на продажбите 3 В практиката най-общо се използват четири подхода: изглаждане на реда; използване на дъми променливи; прилагане на Фурие анализ; комбинация между горните.
  • 5. Метод Forward-backward (A.C.Nielsen) 4 BLQFt  Q t 1  (1   )BLQFt 1 BLQR t  Q t 1  (1   )BLQR t 1 BLQFt  BLQR t BLQt  2
  • 6. Метод Forward-backward с коригиране (A.C.Nielsen) 5 BLQFt  Q t 1  (1   )BLQFt 1 BLQR t  Q t 1  (1   )BLQR t 1 BLQFt  BLQR t PBLQt  2 S ADJ t  Q it i 1 S  PBLQ it i 1 BLQ t  ADJ t * PBLQt
  • 7. Метод Forward only с корекция (Nielsen Solution System) 6 BLQFt  Q t 1  (1   )BLQFt 1 BLQR t  Q t 1  (1   )BLQR t 1 PBLQt  BLQFt  BLQR t 2 N ADJ t  Q it i 1 N  PBLQ it i 1 S COR t  Q it i 1 S  PBLQ it i 1 BLQ t  G t * PBLQt ADJ t  Gt    N * ADJ t  (20  N) * COR t ако N  20 ако N  20
  • 8. Метод Forward only със сезонна корекция (IRI Promotionscan) 7 DLQFt   Qt  (1   )DBLQFt 1 It PBLQt  I t * DBLQFt 1 N ADJ t  Q it i 1 N  PBLQ it i 1 BLQ t  ADJ t * BLQPt
  • 9. Емпирично приложение на метода Forward-Backward . 8 Брой наблюдения: 105 седмици Тип на промоцията: ценова Метод за оценка: Forward-Backward Варианти: -Различен брой периоди преди и след промоцията -Отчитане на пред- и след-промоционални седмици
  • 10. Таблица 1 Базова линия на продажбите на марка А . 9 Модел 4 4а 8 8а 12 12а α MSЕ MPE 0,0 0,0 213,19 717,0 -3,33 -8,51 0,0 0,0 187,69 486,0 -3,03 -12,85 0,0 1,0 416,38 761,13 -3,09 0,41 BLFQt BLRQt Базова линия на продажбите 87,75 71,00 BLFQt BLRQt Базова линия на продажбите 79,25 60,00 BLFQt BLRQt Базова линия на продажбите 84,75 59,88 BLFQt BLRQt Базова линия на продажбите 81,25 53,63 0,0 0,0 173,19 301,989 -2,60 -8,19 67 76,5 57,08 0,5 1,0 292,75 241,71 -0,47 5,35 67 74,33 55,00 0,0 0,0 244,72 215,83 -4,64 -1,92 BLFQt BLRQt Базова линия на продажбите BLFQt BLRQt Базова линия на продажбите 79 70 72 65
  • 11. Таблица 2 Промоционален ефект (в стокови единици) . 10 Модел Базова линия на продажбите 4 4а 8 8а 12 12а 79 70 72 67 67 65 Промоционален ефект 66 75 73 78 78 80
  • 12. Изводи . 11 1. Оценката на базовата линия на продажбите зависи от дължината на периодите. 2. Наличието на екстремуми може чувствително да промени оценката на базовата линия. 3. Отчитането на периоди след промоцията може да резултира в пониска базова линия.