In scheduling and controlling the upgrading of major assets such as a capital ship, the need for upgrades to various elements found on ships are determined, and the upgrade of each piece of equipment is documented as a change product. The change product documentary information is entered into a database, and correlated with information identifying those major assets, which use such products, thereby associating one or more major assets with a change product order. The major assets are scheduled for upgrade on some basis. A promised delivery date of alteration kits, manuals, or other material is obtained from the various vendors. The database may be interrogated at any time in relation to a major asset upgrade, to thereby determine the promised delivery date of the most distant delivery date of yet-undelivered material. The most distant delivery date is deemed to be the integrated logistic support date.