An air traffic controller at Heathrow manages up to 30 aircraft simultaneously. Their radar shows every plane, every speed vector, every potential conflict. If they fixate on a single aircraft and lose track of the rest, people die.

Now picture a typical Monday at a 40-person digital agency: Eight active client projects, three internal initiatives, two developers staffed across four projects at once. The radar? A spreadsheet someone last updated three weeks ago.

That's the gap. Managing multiple projects is fundamentally what an air traffic controller does – only most companies try it blind.

The Distinction Most People Get Wrong

"Managing multiple projects" sounds self-explanatory. It's not. The distinction between related disciplines matters more than most people realize.

Single project management focuses on one project – scope, timeline, budget, team. Everything within the project boundary.

Multi-project management starts where projects compete for the same resources. It's not about making individual projects better. It's about making the interactions between projects visible. Which developer is stretched across three projects? Which project blocks another because a designer is missing? Where are bottlenecks forming that no single project manager can see?

Portfolio management operates one level higher. It decides which projects should exist in the first place – based on strategy, ROI, risk distribution. While multi-project management asks "How do we deliver these eight projects simultaneously?", portfolio management asks "Should we even be running eight projects at the same time?"

In practice, the boundaries blur. At a 30-person IT services company, the same person probably handles all three. But the distinction matters because each raises different questions – and needs different tools.

Why Things Break Down at Five Parallel Projects

Here's a number from the PMI Pulse of the Profession Report 2025 that stuck with me: Only 18% of project professionals demonstrate high business acumen – the ability to evaluate projects in context rather than in isolation. That 18% has a 27% lower failure rate.

The connection to managing multiple projects? It's direct. Looking at projects in isolation means missing the collisions. And the symptoms are painfully familiar to anyone who has ever run more than four client projects in parallel:

Your senior developer is staffed on three projects and productive in none of them. Context switching burns up to 40% of productive time according to the American Psychological Association. Not 5%. Not 10%. Forty percent.

Projects rarely fail at the single-project level. They fail because nobody sees how they're stealing resources from each other.

One project's deadline slips by a week – and suddenly the go-live collides with another client's sprint review. Sales closes a new deal without checking whether the team is fully booked through end of quarter. Sound familiar?

These aren't edge cases. This is the default when multi-project management happens ad hoc.

Multi-Project Management Methods That Actually Work

Articles promising "10 methods" make me tired. Three are usually relevant, seven are padding. Here are the three that actually move the needle for IT services companies and agencies:

Weekly Capacity Planning

Sounds basic. Surprisingly rare. Every week, it becomes visible who is allocated how many hours to which project. Not monthly – too coarse. Not daily – too much overhead. Weekly is the sweet spot.

If Sarah is scheduled for three projects totaling 52 hours in week 14, someone catches it before Monday morning. Not Sarah herself, staring at three competing Slack channels. The difference between a spreadsheet and proper resource-based project planning is that the latter surfaces these collisions automatically – before they eat into your timeline.

Portfolio Kanban Instead of Gantt Overload

Gantt charts work well for single projects. For eight parallel projects, they become unreadable. Portfolio Kanban instead shows all projects on one level: What's in acquisition? What's running? What's stuck? What's being delivered?

The columns aren't the classic "To Do / Doing / Done" – they're project-lifecycle specific: Proposal → Contracted → Setup → Delivery → Acceptance → Completed. Each column has a WIP limit. If more than three projects are stuck in "Delivery" and the team isn't large enough for that – stop, finish one first.

We broke down why Gantt charts work for single projects but collapse at portfolio scale in a separate piece.

Steering Meetings With a Portfolio Lens

Most teams have stand-ups per project. What's missing is a meeting that cuts across all of them – and stays deliberately short. 30 minutes, once a week. No status reports (those live in the tool). Three questions only:

Where are resource conflicts? Where has a priority shifted? Where do we need a decision?

If this meeting runs longer than 30 minutes, either the preparation is poor or the data doesn't exist yet. Both point to the same root cause: the organization is spotting delays reactively instead of structurally.

Multi-Project Management Software Compared

What does software actually need to support managing multiple projects – as opposed to bundling single-project features behind a dropdown menu?

Five requirements that separate real multi-project tools from dressed-up task managers:

Cross-project resource visibility. Not "how many hours did Lisa log this week" but "how many hours is Lisa scheduled for next week across all projects." Past vs. future – that's the critical difference.

Portfolio dashboard. All projects at a glance. Status, budget burn, timeline. Without clicking five levels deep into sub-projects.

Financial project view. Which project is profitable, which one is burning margin? Managing multiple projects without financial data is flying blind with several aircraft at once.

Scalable permissions. Project managers see their projects, executives see the portfolio. Sounds obvious, but many tools don't deliver it.

Integration with existing workflows. No team switches all their tools overnight. The software has to fit into existing infrastructure.

Here's an overview of the most relevant options for IT service companies and agencies:

Leadtime grew out of an IT services company that needed to solve its own multi-project chaos – and it shows in the product. The core idea is a closed loop: Resource planning shows week-by-week who is allocated where, looking forward rather than backward. Time tracking lives in the same system, so planned versus actual utilization sit side by side without exporting CSVs between tools. Financial tracking calculates project margin in real time – so you know whether the third change request just ate profitability before the month closes.

What this looks like in practice: Project A is on schedule but has already burned 85% of its budget. Project B is two weeks behind but financially healthy. Without a single view connecting timeline, resources, and money, you'd discover both of these situations too late. That's the gap most fragmented tool stacks leave open.

Leadtime is built for teams between 10 and 100 people – the size where multi-project management starts to genuinely hurt. It's not the right fit for pure dev teams that mainly need sprint boards and ticket tracking. It's strongest where client projects run in parallel, where delivery bottlenecks need catching early, and where leadership needs financial clarity on which projects actually earn their keep.

Meisterplan focuses on long-term resource planning and scenario-based decision-making. Strong for companies that need to make strategic portfolio decisions. Less suited for day-to-day operational steering.

OpenProject is open source, GDPR-compliant, and self-hostable. A solid choice for organizations where data sovereignty is non-negotiable. The multi-project features cover the basics, though the learning curve is steeper than purpose-built alternatives.

Projektron BCS is a German-built platform that goes deep on multi-project management. The feature set is comprehensive – and the learning curve matches. Best suited for larger organizations with dedicated PMO structures.

PLANTA Project positions itself as a hybrid solution "Made in Germany" and supports both traditional and agile project management. Proven in the DACH mid-market with solid resource planning.

The honest answer to "Which tool is best?" is always the same: It depends on how your company works. A 15-person startup and a 200-person IT services firm with a PMO need fundamentally different things. The feature comparison matters less than the fit question: Does the tool adapt to your processes, or do you have to reshape your processes around the tool?

The Difference Between a Tool and a System

I keep seeing the same pattern: Teams buy multi-project management software, roll it out, and six months later wonder why nothing has changed. Almost never the tool's fault.

An air traffic controller doesn't become effective because they have a radar screen. They become effective because they have training, clear protocols, and an organization that takes overload seriously. In busy airspace, sector capacity limits cap controllers at 18 to 25 aircraft. No airport says: "We're short-staffed, so let each controller handle 50 planes."

Companies do exactly that with their projects. The delivery bottlenecks that follow are structural, not technical. No software fixes an organization that won't say no.

The software makes the situation visible. The decision about what to do with that visibility – take on fewer projects, set real priorities, turn down work – that stays with people.

We built Leadtime because we were missing that visibility ourselves. Not because we cracked the code – but because we had the problem long enough to know where it hurts.