Heijunka (Leveling) ‘is aimed at producing the quantity taken by one
person from the one that precedes it. The production process are arranged to
facilitate production of the required quantity at the required time, and
workers, equipment, and all other factors are organised toward that end thus
timing and volume are critical’ (Shingeo shingo page 123) keeping stock low and in continuous
reserve is maintained by building to customer demand while standardised work
encourages a consistent supply of material. Toyota could allow clienteles to be
able to tailor their home for example choosing a house with differently
arranged modules to suit their site along with a range of options such as
colours, material and interiors but at the expense of it being the standardised
model. The principle is not new for Toyota already offer options in their
automobile service through the choice of colour or the material the seat inside
a car is made of. An excellent example on a smaller scale is Nike. Their
interactive website allows to choose a trainer with an established structure
although the material and the parts that make the trainer can be customised.
Shoppers can ‘design’ their unique trainers for a small fee.