Summary Notes for fast and comprehensive revision. It includes the formula and the basic concepts of the related topic. Helpful for last day revision of important topics of important chapters.
what is cost How much to When to Stock valuation
of material purchased purchase & control
How much to purchase
A → Annual Purchase Requirement
Q → No. of units to be purchased at a time
C.P.U → Cost per unit
O → ordering cost per order
C → Carrying cost per unit per anum
T.O → Total Orering cost per anum
→ A
xO
Q
T.C → Total carrying cost per annum
→ Q
xC
2
PC = A x C.P.U
TAC = TO + TC +PC
When to purchase
→ Stock levels
Re-order Level = (Maximum Consumption x Maximum lead time)+ safety stock
Max. Stock Level = Rol - (minmum cons x minmum lead time) + ROQ
Min. Stock Level = Rol - (Avg. cons x Avg Lead time)
Avg stock level = Max stock + Min stock
2
Alternative
Min stock level = ROL - (Avg cons x Avg load fix)
ROL = Min stock level + (Avg cons x Avg load hr)
1
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