Métodos cualitativos de inventario

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NAIVE METHOD

For this model the forecast is equal to the actual value observed during the last period. Se toma la cantidad del anterior año.

Example:

Based on the following data and using the nave method determine the forecast for year 2022.

SIMPLE MEAN AVERAGE METHOD

For this model the forecast (mean) is equal to the average of all available data. Se suman todas las cantidades y se divide es como sacar la media.

Example: Determine the forecast using the simple mean average method for the following data.

MOVING AVERAGE METHOD

For this method, the forecast is equal to the average value over a set period of time. A partir del que se va a sacar se toma en cuenta tres anteriores y se dividen entre 3.

Example: using the following data and the moving average method, determine the forecast.

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WEIGHTED MOVING AVERAGE METHOD

It is a type of moving average in which every quantity to be averaged is assigned with a specific weight.

IMPORTANT: The sum of all weight must be equal to 1.0.

Example: Using the weighted moving average method, determine the forecast as per required in the following table.

Where:

T-1=0.4

T-2=0.35

T-3=0.25

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EXPONENTIAL

This is the most frequently used technique in the industry, because of:

• Easy to use
• It just need three kind of data

• Last period forecast (Ft-1)
• Last period actual value (At-1)
• Exponential coefficient (∞) usually between o & 1.0

Formula:

Ft= Ft-1+Alpha*(At-1-Ft-1)[pic 4][pic 5][pic 6][pic 7][pic 8][pic 9]

INVENTORY

Inventory is a very expensive asset which can replaced for another one which is less expensive and that is called… INFORMATION

However, the information must be reliable, accurate, timely and consistent.

What´s inventory?

Inventory generally refers to the materials that are in the stock.

What´s inventory management?

It is making sure that materials are available when needed.

It´s the practice of planning, organizing, directing and controlling the activities of inventory.

It is also the art of managing to have THE RIGHT PRODUCT at the RIGH TIME. IN THE RIGHT PLACE and at the possible RIGHT PRICE.

The primary objectives of inventory management.

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VERY IMPORTANT INVENTORY Mgmt should strike the balance between NOT TOO MUCH AND NOT TOO LITTLE.

An affective inventory management should:

1. Maintain sufficient stock of the materials.
2. Ensure a continuous supply to production departments.
3. Minimize carrying costs and time.
4. Maintain sufficient stock of finished goods for smooth sales operations.

Based on what you learned…

WHY DO WE NEED TO MANAGE INVENTORIES?

Is important because we need to control of the materials and the products that we have. And know if we have the balance.

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