View source for P. Anderson and M. Tushman: Technological Discontinuities and Dominant Design: A Cyclical Model of Technological Change.

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===Theory===
The authors propose a cyclical model of technological change.  In their model, A technological discontinuity occurs followed by an era of ferment which is characterized by design competition and substitution.  Next, a dominant design emerges, and an era of incremental change follows.  This era is characterized by elaboration of dominant design.

===Hypothesis===
# The mean number of new designs introduced during the era of ferment is greater than during the era of incremental change.
# The era of ferment following a competence destroying  discontinuity is longer than the era of ferment following a competence enhancing discontinuity.
# The era of ferment grows shorter in each series of consecutive competence-enhancing discontinuities.
# In regimes of low appropriability a single dominant design will emerge following each technological discontinuity.
# After each technological discontinuity, sales of all versions of the new technology will peak after the emergence of a dominant design, not during the era of ferment.
# A technological discontinuity will not itself become a dominant design.
# A dominant design will not be located on the frontier of technical performance at the time it becomes dominant.
# Dominant designs arising from competence-destroying discontinuities will be initiated by new entrants in the industry while dominant designs arising from competence-enhancing discontinuities will be initiated by firms whose entrance preceded the discontinuity.
# Most of the total performance improvement of the lifetime of a technology will occur outside the era of incremental change.