ISA Calculations SELV Requirements - Final

This table specified the ISA calculations that should be implemented in SELV.

 

 

ProductDoses

vrMIS Formula

 

Target

Population

Percentage

Doses per

patient

per year

Wastage

Factor

Buffer

Stock

Minimum

Quantity

Max

Quantity

BCG20population * 0.04 * 1.5 / 12 * 1.25; isa.bcg = (quantity > 100) ? Math.ceil(quantity) : 100;4

1*

vrMIS was 1.5.

1.25

50%*

vrMIS was 0.


100

 0
Polio 20 dose20

population * 0.039 * 4 * 1.1 / 12 * 1.25

3.94

1.1

25% 0 0
Polio 10 dose10population * 0.039 * 4 * 1.1 / 12 * 1.253.94

1.1

25%0  0
Penta 1 dose1

population * 0.039 * 3 * 1.1 / 12 * 1.25;

3.93

1.1

25%0  0
Penta 10 dose10population * 0.039 * 3 * 1.1 / 12 * 1.25;3.93

1.1

25%0  0
Measles10

population * 0.039 * 1.3 / 12 * 1.25;
isa.measles = (quantity > 50) ? Math.ceil(quantity) : 50;

3.91

1.3

25%

0

vrMIS was 50

 0
Tetanus (VAT)10

population * 0.05 * 2 * 1.1 / 12 * 1.25;

52

1.1

25% 0 0
PCV102

population * 0.039 * 4 * 1.1 / 12 * 1.25;

3.9

3

vrMIS was 4

1.125% 0 0

Syringes 5ml


 

((isa.bcg / 20) + (isa.measles / 10)) * 1.11
isa.syringe5ml = Math.ceil(quantity / 10) * 10;

 

package size 10

  

Syringes .5 ml

Used for everything except BCG
 

(isa.penta + isa.measles + isa.tetanus) * 1.11;
isa.syringe05ml = Math.ceil(quantity / 100) * 100;

4.12

 

131.150%  

Syringes .05ml

Used for BCG

 

isa.bcg * 1.11;
isa.syringe005ml = Math.ceil(quantity / 10) * 10

411.150%  
Safety Box 

(isa.syringe5ml + isa.syringe05ml + isa.syringe005ml) / 150;

      
Gas No calculation listed      
HPV  231.125%  

*for BCG, vrMIS had a doses per year value of 1.5, and a buffer stock of 0%. SELV doesn't allow decimal values for number of doses, so to make the resulting ISA the same I've changed doses per year to 1 in SELV, and buffer stock to 50%.

 

 

 
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