Table 1 Summary of the OM framework as...

Table 1

Summary of the OM framework as defined in C760 (Table 7.2 of Gaba et al. (2017))

OM approach	Ab initio (from the start)		Ipso tempore (in the moment)
OM approach	A – optimistic (Peck, 1969)	B – cautious (Ciria R185 (Nicholson et al., 1999))	C – proactive	D – reactive (Peck, 1969)
When does OM design work start?	Before wall construction		After wall construction
Starting design assumptions	Most probable parameters	Characteristic parameters	Necessary, from back-analysis of initial stages
Back-analysis requirements	Necessary, with reliable case study data	Preferred	Use initial construction stages
Design objectives	Optimise wall depth/strength support	Optimise wall support	Reduce wall support	Increase wall support
Alternative design plans	Use contingency plan	Use modification plan	Introduce modification plan	Introduce contingency plan

OM approach	Ab initio (from the start)		Ipso tempore (in the moment)
OM approach	A – optimistic (Peck, 1969)	B – cautious (Ciria R185 (Nicholson et al., 1999))	C – proactive	D – reactive (Peck, 1969)
When does OM design work start?	Before wall construction		After wall construction
Starting design assumptions	Most probable parameters	Characteristic parameters	Necessary, from back-analysis of initial stages
Back-analysis requirements	Necessary, with reliable case study data	Preferred	Use initial construction stages
Design objectives	Optimise wall depth/strength support	Optimise wall support	Reduce wall support	Increase wall support
Alternative design plans	Use contingency plan	Use modification plan	Introduce modification plan	Introduce contingency plan