scope:

The guideline VDI 4480 Part 3 applies to automated circulation storage systems. In these storage systems the individual storage locations move horizontally (e.g. carousel storage system) or vertically (e.g. patemoster racking Installation) with respect to a continuous, self-contained belt. The individual storage levels or storage columns can have a separate or com¬ mon drive. The goods are stored in and/or retrieved from the storage locations by automatic storage and retrieval machines (here: RBS). Such RBS are frequently stationary.

The guideline applies both to systems with Single and multiple circulation storage systems. It takes account of multiple input and Output points (EPs and APs). The RBS can take up, i.e. input or Output, one or more transport units (TEs) at a time, (single or multiple load capacity). There may also be a multiple arrange¬ ment of RBS.

Purpose of this guideline

The great variety of modern storage systems and technologies makes it very difficult to choose the optimal system for a given task. The throughput is one of the most important characteristic values in this connection. For a comparison between different sys tems and technologies it is necessary to use a standardized analysis method.

For the first time, the series of guidelines VDI 4480 establishes the conditions for this. With the help of these guidelines, the throughput of a storage system can be both calculated mathematically (e.g. in the planning phase) and established in practice (e.g. during a final inspection procedure). An exact defmition of the basic conditions, which are the same for all types of storage systems, establishes a Standard basis from which a comparison is possible.

The guideline is equally useful for the planner, the manufacturer and the owner/user of a storage system and helps to objectify the evaluation of storage sys tems.