According to the definition in EN 1559, an initial sample is a casting which is completely manufactured by means of the equipment and processes used for series production under the appropriate control conditions (in contrast to this, see Prototype).
The initial sample is to furnish the proof that the manufacturer (the producer of the casting) is in the position to comply with the quality requirements requested by the purchaser concerning dimensional accuracy, material composition, material properties and function (see Initial sample testing).
The supply of initial samples may be agreed between the purchaser and the manufacturer. If the limit values or tolerances agreed by the purchaser and the manufacturer are exceeded on the initial sample, and if the purchaser gives his approval for such deviations, new limit values or tolerances may be agreed. Preliminary agreement of acceptance criteria and conditions, as well as documentation of such agreements in the contract is recommended.
EN 1559-1, Founding – Technical conditions of delivery – Part 1: General