These images detail an inventory estimation program developed in the
late 1970's for the HP67/97 programmable calculators. This program was
used in the Firestone warehouse at Akron HQ (one of the largest U.S.
corporations at that time) which managed all corporate forms,
advertising materials, and miscellaneous supplies that we shipped to
our large tire warehouses, tire manufacturing plants, and 4000-plus
stores. This program reduced floor inventory by 1/3 (approx. one
million 2012 dollars) while at the same time reducing backorders from
an average of 100 items to 10 or less. This program was not accepted in
the suggestion channel because "We will be using a forecast model
instead of a history model". I still have that document, and I remember
clearly that the department which used the forecast model was
outsourced shortly after the suggestion was returned. The HP67/97 was
the first programmable calculator suitable for this task since it had
sufficient one-card memory storage. Program storage was another matter.
In order to get all program steps for all functions into memory at one
time (and on a single backup card), the program was highly compressed
which required approximately 250 hours of work.