Designs may be developed in-house or bought in, or a mixture of both. Designs may come from archives of designs that have already been developed and sampled. A few designs can be assembled around each theme or group and any areas where it is felt designs are missing will prompt more sampling. Production capabilities and machine loading must be considered. For example, there is no point when designing a range of knitted fabrics to produce all the fabrics for this on one specific machine type if the manufacturing company owns several different types of machines, producing quit different fabrics,. It is only when all such considerations have been taken into account that the final selection of the designs to be included in the range will be made.