Why Your Sustainable Portfolio Keeps Reverting to Old Habits

A few years ago I watched a government agency do everything right. Facing a budget crunch, it redesigned its project portfolio process so that every proposal had to demonstrate its strategic contribution before a dollar was spent costing it. It worked. Low-value proposals stopped clogging the pipeline. Decision-makers got a common language for talking about value instead of just cost. Everyone was pleased.

A year later, the team that had built it was disbanded, and the hardest, most important part of the reform, independent assessment of what a project was actually for, quietly disappeared. The scorecards stayed. The judgement behind them didn’t.

If you work in sustainable project management, this story should feel familiar, because it’s the same story we keep telling about ESG scorecards, P5 assessments, and sustainability-weighted selection criteria. An organisation adopts a sustainability lens for its portfolio. It looks great in year one. By year three, the criteria are still technically on the form, but nobody in the room is actually arguing about them anymore. The green box gets ticked and the conversation moves on.

I don’t think this happens because people stop caring about sustainability. I think it happens because we keep trying to fix a practice problem with a process solution.

Process is not the whole system

Most portfolio reform, sustainable or otherwise, focuses on the same three things: better selection criteria, better scoring templates, better dashboards. These are Process and Performance interventions. They’re necessary. They’re also, on their own, not enough, and the reason is almost embarrassingly simple: a scorecard doesn’t decide anything. People do.

When I went back and analysed that government reform properly, using a framework I’d developed for exactly this kind of question, I found that what determined whether the change survived had almost nothing to do with the quality of the scoring model. It came down to four other things entirely: whether people actually behaved differently in the room where decisions got made (not just what the form said); whether the people carrying the reform had the seniority and authority to make it stick; whether the organisation’s professional and governance apparatus treated the new approach as a real institution or as a compliance exercise; and whether any of that survived being repeated, month after month, once the initial enthusiasm wore off.

Three of those four things are almost never discussed when organisations design a sustainability-weighted portfolio process. We talk endlessly about the fifth criterion, the weighting formula, the reporting cadence. We almost never talk about who in the room actually has to defend an unpopular sustainability call against a business unit that wants its project funded anyway, or what happens to that person’s standing when they do.

The tell-tale sign

Here’s a diagnostic I use now, and it costs nothing to apply: watch what happens when a genuinely well-performing, popular project scores badly on sustainability criteria. Does the criterion actually kill the project, delay it, or force a redesign? Or does someone quietly find a way around the scorecard?

If it’s the second one, you have a sustainability authority problem rather than a sustainability process problem, and no amount of refining the P5 weightings will fix it, because the weightings were never the thing deciding outcomes in the first place.

In the case I studied, the single most powerful intervention was a change to how proposals were reported rather than a new tool: rankings were anonymised so that when a business unit’s pet project didn’t make the cut, its sponsor could walk away and tell their team “we put up a good fight but lost” instead of “our project got killed and everyone in the room watched it happen.” That one design choice, invisible on any process map, absent from any dashboard, did more to make hard trade-offs stick than the entire scoring methodology combined.

Sustainability portfolio decisions are exactly this kind of hard trade-off, over and over. Someone has to be willing to tell a popular, revenue-generating, politically-connected project that it isn’t proceeding, or isn’t proceeding as designed, because of its environmental or social footprint. If your organisation hasn’t thought about how that person survives making that call more than once, your sustainability criteria are decorative.

What to actually check

If you’re responsible for embedding sustainability into a portfolio process, here are the questions worth asking that a scorecard review will never surface:

Who in the governance forum has actually said no to a popular project on sustainability grounds in the last twelve months, and what happened to them afterward? If the answer is “nobody” or “I don’t know,” that’s your real finding.

Does your sustainability criterion have an institutional home, such as a standard, a governance body, or a professional mandate, or does it live entirely inside one enthusiastic manager’s job description? Criteria that depend on a single champion disappear the moment that champion changes roles, gets promoted sideways, or simply gets tired.

Is your sustainability language still being spoken in the operational sense of cost, schedule, and compliance three years after launch, or has it shifted into genuinely strategic terms? If everyone’s still describing sustainability work as “the extra reporting we have to do,” the practice hasn’t taken hold, no matter how the paperwork reads.

And the hardest question: if your organisation’s budget got cut in half tomorrow, which parts of your sustainability portfolio process would survive? In the case I studied, the parts that survived were the ones that cost the organisation nothing to keep, a template field, a checkbox. The parts that required someone to keep doing something difficult, repeatedly, under pressure, were the parts that vanished first.

The reframe

None of this is an argument against better sustainability metrics, better P5 scoring, better dashboards. It’s an argument that these things are necessary and not sufficient, and that the gap between “necessary” and “sufficient” is exactly where sustainable portfolios quietly revert to business as usual.

If you want a sustainability initiative to survive contact with a budget cut, don’t just ask whether your criteria are the right criteria. Ask whether anyone in your organisation is actually equipped, authorised, and institutionally protected to enforce them when it’s inconvenient.

That’s a practice question rather than a process question, and it’s the one most portfolio reforms never get around to asking.