It would include the energy spent designing the manufacturing process and would go back decently far. Difficult to measure however. 

617a7a

bitcoin

The objective, energetic economic value of BTC

> Instead of valuing goods and services in BTC through using the USD price (price ≠ value), which uses the exchange rate, we should value (and so forth price) Bitcoin prices in energy (Joules).

Agreed

> You can scientifically calculate the amount of energy (in labour) used to create the good, then use the average energy in joules used to develop a satoshi to calculate the value. [...] For context, a medium apple contains about 395 kJ, or the value equivalent of 59 sats.

Even with your caveat of "price ≠  value" this is arbitrary. Your approaching the whole economy from a very Bitcoin perspective - while any economy is intrinsically a chaotic system and more complicated.

Example: A product can be complicated to produce and expensive with little energy use, another product can be energy intensive to produce but cheap to buy. 