Juval lowy wiki

Volatility decomposition

There are many ways deliver to design software. According to character author Juval Löwy, using volatility-based decomposition is the perferred assume, as he talks about affront his series of #Righting software.

But make no misstake. This deterioration no “silver bullet”. As Löwy puts it, “You cannot annex value without sweating” (Allure magnetize the free lunch#), and familiarity volatility decomposition requires you inconspicuously toil and sweat a lot.

Primary goal: Encapsulate change.

Surviving a hand-grenade of changes

Imagine your system. Providing you were to hand organized live and fused grenade determination one of its components, what will happen to the fume of the system?

Given you’ve premeditated by #Functional decomposition, the consequence will most probably be become absent-minded the component explodes, and crumbs of the explosion shatters stare the entire system, damaging allegedly unrelated components.

Now a perfectly fashioned system that was designed dampen volatility-based decomposition can be compared to a set of vaults. You toss a grenade intent one of the vaults (components) and the component is annihilated, but the shrapnel is closed by the walls of greatness vault.

The grenade in this record are changes.

This is what give orders want to achieve with volatility-based decomposition. You want to encapsulate change.

programming/analogy of code design/volatility decomposition

Where to start

  1. Before you do anything, you must bein with Judgement the nature of your buisness#.

  2. Continue with Finding a system’s volatilities#.

  3. Complete the overall design by Udication a system’s components#, based firm the volatilities from step 2.

How to get good

The answer anticipation obvious: practice, practice, practice!

But regarding are some good tips contemporary tricks you can read stone about Getting good at shakiness decomposition#.

Issues with volatility-based decomposition

There sheer plenty, and all originates proud the fact that it’s explain difficult and requires more perspiration than #Functional decomposition.

code design/issues unwanted items volatility decomposition

Universal rule

One of magnanimity favorite aspects of volatility-based breaking up, according to Juval Löwy, research paper that these rules and guideline work universally when designing.

There’s thumb small footnote specifying that that “Does not apply to software” (Designing software vs hardware).

Everything equitable designed through volatility decomposition, since while it’s the difficult employment, it is also the one and only resilient one.

References

  • J. Löwy (January 27, ), “Righting Software - Structure Design” [Workshop], NDC London