z415

Original author(s)

Hartmut Bossel

References and/or links for original model

Format of original model

E.g. Vensim, Stella, Fortran program, Excel spreadsheet, description in journal paper.

Converted by

Faye Warrender

Date submitted

20/04/2012

Purpose

Description

Model size indicators

Stocks and flows

Simile diagram

Simile equations

supply index= (ORIGINAL RESOURCE RESERVES-cumulative resource consumption)/ORIGINAL RESOURCE RESERVES

price level= if supply index>0.1, then 1/supply index else 10

recycled resource= scrapping rate*resource recycling share* RECYCLING 0 or 1

resource exploitation= (resource demand-recycled resource)*supply index

cumulative resource consumption= INITIAL CUMULATED CONSUMPTION

production rate= resource exploitation + recycled resource

scrapping rate= resource in use/PRODUCT LIFE CYCLE

resource in use=PRODUCT LIFE CYCLE

growth of resource demand=(CONSUMPTION INCREASE TODAY/100)*resource demand*(1-resource demand/ INITIAL RESOURCE DEMAND*MAX DEMAND FACTOR)

resource demand= INITIAL RESOURCE DEMAND

Files

The model and associated files are listed at the bottom of this page. The model may be provided in more than one format (e.g. as Vensim .mld and Simile .sml files).

Notes on the conversion process

Extra information on original model