Objects of the value stream toolbox > Transport objects

Contents

1. Brief description

The FIFO (First In First Out) object is mostly used in Kanban lines or in push constellations, where the FIFO objects connect approximately two consecutive objects of the type process.

2. Procedure and control description

The objects Transport (internal) and FIFO share the behavior.

The FIFO route induces PUSH control, i.e. subsequent process objects may not be controlled by info flow (local orders are generated accordingly by part input).

After entering the object, products (in conveyors) are passed on to a successor in the same order in which they entered the object, after a time consumption (transport duration as minimum dwell time).

The handover is active, i.e. when a successor is ready to receive products, conveyors with products are pushed on.

Products cannot overtake on the FIFO line.

20220718_fifo_1

Figure 1 - Procedure and control description

Impact of transfer quantity & Carrier capacity with blocked downstream process

•FIFO object can carry 4 carriers in total at a time.

•Each carrier in the FIFO object can hold 2 parts each, which is the transfer quantity.

•With order quantity of 10 and FIFO capacity of 4, one container will be blocked inside the station and the station is also blocked.

20220718_fifo_2

Figure 2 - Impact of transfer quantity & Carrier capacity with blocked downstream process

3. Parametrization

20230413_FIFO_parameter_EN

Figure 3 - FIFO

Parameter	Required	Description
Name	no	Name of the object
Transportation time	yes	Duration for passing a product-conveying aid (minimum dwell time)
Max. number carrier	yes	Capacity of conveyor equipment in object (products per conveyor equipment depending on quantity passed on from predecessor process/object)
Exit strategy	yes	Logic according to which the products leave the object
Comment	no	Custom notes and annotations

4. Connection types

See chapter Possible connections to objects.