An account at a local bank

A step that takes twelve days, never goes out of date, and is wanted by eight other steps. On its own that is unremarkable. What makes it the centre of this record is that three of the eight things waiting on it are also among the five things it waits on.

In both directions

The tax number and the showing of income appear on both sides. The registered address appears on the left and returns on the right by way of the lease. Those three returns are three separate rings, and they are the seed of everything else. The operational question here can be tested with employee workload analysis, provided the team agrees what the information can and cannot establish.

What it is for in the map

Two things, and they pull in opposite directions.

It is how money is received and paid in the place where somebody is, which means almost every arrangement involving money waits on it. Additional public research relevant to complex systems and work can be found at International Labour Organization.

And it is a verified fact about a person, which means the institution producing it has to establish several other facts first — where they live, what they are registered as, what they earn.

A step that is both a prerequisite for verification and a product of verification will close circles with everything it touches. This one touches thirteen steps.

The account is not the hardest thing in this map. It is the thing most other hard things are on both sides of.

Thirty-four of forty-six

It stands in thirty-four of the map's forty-six rings. Removing it from the ordering problem leaves twelve.

More telling: the arithmetic of which small sets of steps would dissolve the whole map was run exhaustively, and there are forty-eight different sets of five that do it. The account appears in all forty-eight. No five-step set works without it.

That is a stronger statement than any count of rings. The account is not merely the busiest step here; it is unavoidable.

The two-step pairs

Two of the map's four mutual pairs run through it.

The account and the showing of regular income require each other: eighteen days round, with give, because the account can be opened on some other footing and the income shown afterwards.

The account and the tax number require each other: twenty-eight days round, with give the other way, because the tax number can be obtained provisionally and corrected once the account exists.

Both are passable. Both involve producing a form that does not quite describe the situation. Everybody who has done this has a version of that story, and this is where it comes from.

The one good property

It never expires.

That puts it in the ten-step group of permanent things, which means that unlike most of this map it can be obtained at the first opportunity and held. It is the only hub in the record with that property.

A person who gets an account early has banked something that cannot be spent by waiting — which, in a map where twenty-six of thirty-six steps are on a clock, is worth more than the twelve days it costs.

Twelve days against thirty-four rings

The disproportion is the point. Twelve days of waiting, one visit, nothing rare or difficult — and the circular structure of a thirty-six-step map hanging off it.

Set beside the slowest step in the record, the comparison makes the shape of this map plain. The decision is seven times longer and appears in a fifth as many rings. Duration and entanglement are unrelated here, and a person reading a list of steps by how long they take will get the difficulty exactly backwards.

Nobody arrives expecting the bank to be the problem. It takes a fortnight and sounds like an errand, and it is the object around which three quarters of this record is arranged.

The hardest thing in this map is a twelve-day errand. What makes it hard is not the errand but where it stands.

Five in front, eight behind

The balance is unusual. Most steps in this map lean one way: either they collect many things and lead nowhere, like the file, or they wait on little and are wanted by much, like the passport copy.

A step that is heavy in both directions is exactly the shape that produces rings, because it has many ways to be reached and many ways to lead back. The account is the only step in this record with both figures above four.

What it is not

No bank, product, jurisdiction or requirement appears on this map. "An account at a local bank" is a role: somewhere money can be received and paid, in the place where the person is.

And the thirty-four rests on judgement. Several of those thirty-four exist because the map marks the lease as unable to complete without a local account. If that marking is wrong, this page is arithmetic about a different object, and the part of this record about the dependencies most likely to be wrong says so in detail.