The Five Phases of Choosing By Advantages

Beyond Problem Solving: The Five Phases of CBA That Most Teams Never Complete

Most Choosing by Advantages training, most blog posts about CBA, and most conference presentations focus on the decision-making phase the part where a team summarizes attributes, identifies advantages, weights their importance, and selects the alternative with the greatest total importance of advantages. That is Phase Three of a five-phase system. Most teams learn Phase Three, skip or improvise the other four, and then wonder why their group decisions still feel messy, why participants leave the room second-guessing the outcome, and why the decisions made in the meeting do not always survive contact with implementation.

The five phases of CBA for moderately complex decisions exist because making a sound decision is not just the moment of selection. It is a complete process that begins before the alternatives are identified and ends after the decision is evaluated in practice. Skipping or compressing any phase introduces the exact problems that CBA was designed to prevent.

Phase One: The Stage-Setting Phase

Every decision exists in a context. The Stage-Setting Phase is where that context is defined precisely enough to make the decision meaningful. If the decision is being made to overcome a problem, this phase begins by defining the problem clearly and then digging to its root cause because making the right decision to address the wrong problem produces a result that does not help.

This phase also identifies who will participate in the decision. Not necessarily everyone with an opinion, but everyone whose voice should be heard the customers whose needs will be affected, the stakeholders whose interests are at stake, and any parties whose absence from the decision-making would result in a gap that undermines the outcome. Being strategic and intentional about participation at this stage prevents the downstream problems of stakeholders who feel excluded and resist implementation.

Before the decision-making process begins, participants receive basic CBA language training: the precise meanings of alternative, attribute, advantage, criterion, and factor in the CBA context. This is not overhead. It is the alignment that makes Phase Three possible when everyone in the room is using the same words with the same meanings, the collaborative negotiation that CBA requires can happen. When they are not, conversations conflate concepts and produce confusion that derails the process.

The phase concludes by establishing the criteria the standards that will guide judgment. This includes any laws, regulations, or policies that constrain the decision, and the documented needs and preferences of the customers and stakeholders that will shape it. Getting alignment on criteria before anyone has seen or evaluated the alternatives prevents the most common form of group decision-making dysfunction: arguments about criteria that are actually arguments about which alternative someone prefers, surfaced after the fact.

Phase Two: The Innovation Phase

Phase Two identifies and develops the alternatives. The first step is creating a list of candidates that spans an adequate range of options. The second step is getting genuinely creative looking beyond the obvious candidates to identify alternatives that might not be on the standard list but that could be the best available option. The principle is direct: it is impossible to select the best alternative if that alternative has not been considered.

Within this list, the team determines which attributes of each alternative reveal the significant differences that matter for this decision. Depending on the complexity of the decision, a detailed comparison display may be useful making the attributes of every alternative fully transparent to the group so that Phase Three can proceed from shared understanding rather than from different impressions of what each option actually offers.

The innovation label for this phase reflects something important: the alternatives set is not fixed by convention. Creative thinking about how a project could be delivered differently, how a design challenge could be approached from a new direction, or how scope could be restructured to open up options that did not exist in the original framing all of this belongs in Phase Two.

Phase Three: The Decision-Making Phase (Mentally Choosing)

This is the phase most commonly associated with CBA in the construction industry. The team summarizes the attributes of each alternative, identifies the advantages of each relative to the least-preferred attribute on each factor, weights the importance of those advantages relative to each other, and selects the alternative with the greatest total importance of advantages compared to cost.

The description of this phase as “cut and dry” is misleading. In practice, this phase requires real skill in group listening, collaborative negotiation, and the discipline to weight advantages based on their genuine importance to the decision context rather than based on which alternative individual participants prefer. CBA is both subjective and objective it does not produce a mechanical answer from an algorithm. It structures a conversation in which the team’s collective judgment becomes visible and documentable.

Phase Four: The Reconsideration Phase (Emotionally Choosing)

This phase is where decisions are most commonly abandoned, abbreviated, or skipped entirely and it is the phase most responsible for the phenomenon of participants who leave a decision-making meeting and immediately begin undermining the outcome.

After the team has a decision on paper from Phase Three, Phase Four asks: does this decision feel right? If not, why not? If the team needs to revisit the analysis, Phase Four is the structured opportunity to do so to go back to the criteria, the attributes, or the importance weightings, understand what needs to change, and change it. This is not weakness or inconsistency. It is the acknowledgment that sound decision-making integrates the analytical and intuitive dimensions of judgment.

Once the reconsideration is complete and the decision is confirmed, the team forms a clear and motivational perception of each advantage of the selected alternative a vivid understanding of what the selected option actually offers and makes a genuine commitment to implementing the final decision. Barriers to implementation are identified and addressed. Depending on the scope of the decision, there may be value in putting a day or two between Phase Three and Phase Four to let participants rest with the decision before reconvening to confirm it.

Phase Five: The Implementation Phase (Physically Choosing)

Phase Five is where the decision becomes action. The team implements the decision with a clear understanding of the expected outcome what success looks like which creates the reference point for any adjustments needed during implementation. After implementation, the process and results are evaluated, and improvements are identified for the next decision of this type.

This evaluation loop is the connection between CBA and the continuous improvement discipline that runs through all of Lean construction practice. The decision is not final at the moment of selection. It is a hypothesis about the best available choice given the information at the time. Evaluating whether the decision produced the expected outcome and understanding why or why not is how decision-making quality improves over time.

Here are the signals that all five phases of CBA are being practiced rather than just Phase Three:

• The decision’s purpose and the root cause of the problem it addresses were documented before alternatives were identified
• All relevant stakeholders were identified and their needs were incorporated into the criteria before any alternative was evaluated
• The alternatives list was expanded through creative thinking beyond the obvious candidates
• Participants had time to reconsider the Phase Three outcome before the decision was finalized
• The expected outcome of the decision was stated clearly before implementation began, creating a reference point for evaluation

Why All Five Phases Matter

The bad group decision experiences that most construction practitioners can recall almost always involve a skipped phase. Criteria that were not established before the alternatives were evaluated, leading to criteria arguments that were really preference arguments. Stakeholders who were not involved in Phase One, surfacing objections in Phase Four or after implementation that could have been incorporated earlier. Alternatives lists that did not include the best option because Phase Two was too brief. Decisions that felt right analytically but wrong intuitively, with no Phase Four to examine that discomfort before the decision was committed.

The five phases exist because group decisions are complex social and analytical processes, and the complexity does not reside only in the moment of selection. It extends backward into how the problem is defined and who is involved, and forward into how the selected alternative is committed to and implemented.

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All five. Every time.

On we go.

Frequently Asked Questions

What are the five phases of CBA for moderately complex decisions?

Stage-Setting defining the purpose, participants, and criteria. Innovation identifying and developing the alternatives. Decision-Making analytically selecting the best alternative using advantages and importance. Reconsideration emotionally checking the decision and committing to it. Implementation acting on the decision and evaluating the results.

Why is Phase Four the reconsideration phase important even after a rigorous Phase Three?

Because sound decisions integrate analytical and intuitive judgment. Phase Four provides the structured opportunity to examine whether the analytical outcome feels right, revisit the analysis if it does not, form a vivid understanding of what the selected alternative offers, and make a genuine commitment to implementation. Skipping it produces participants who leave the room uncommitted and undermine the outcome.

What happens when criteria are not established in Phase One before alternatives are evaluated?

Criteria arguments arise in Phase Three that are actually preference arguments participants advocate for criteria that favor the alternative they already prefer. This derails the collaborative process and produces decisions that feel contested rather than genuinely agreed upon.

Why is the Innovation Phase important if an obvious set of alternatives already exists?

Because it is impossible to select the best alternative if that alternative has not been considered. The innovation phase invites creative thinking beyond the conventional list of candidates, which is where the genuinely best option often lives in the combination or restructuring of elements that conventional options do not include.

How does Phase Five connect CBA to continuous improvement?

By treating the decision as a hypothesis and evaluating whether it produced the expected outcome. When the results are compared to the expected outcome and the gaps are analyzed, the team learns what it would do differently in the next similar decision which is the PDCA cycle applied to decision-making quality.